system sensor 2wb compatibility


alarm verification. Wire connections are made by stripping approximately 14-inch of insulation from the end of the feed wire, inserting it into the proper base terminal, and tightening the screw to secure the wire in place. further simplified by the incorporation of features compatible with drywall In wet or excessively humid areas, or next to bathrooms with showers. A05-0395-007 4/09 #2132 SpectrAlert Advance Dimensions Model Description Wall Horn Strobes P2R* 2-Wire Horn Strobe, Standard cd, Red System Sensor is not selling, supporting or endorsing AFMGs EASE Evac voice evacuation software. The System Sensor 2W-B is a 2-wire smoke detector and a member of System Sensors i3 Series of photoelectric smoke detectors. B401B / B406B / B110LP / B116LP A 120 System Sensor 2800 A Photo N/A N/A 120 System Sensor 2800TH A Photo / Therm. The 2W-B is a 2-wire, photoelectric i3 smoke detector. $5899 $69.99. tamper release tab, located on the skirt of the mounting base, and turn the 1. DIAMETER TOOL, Figure 5: Removing/Replacing Screen/Sensing Chamber Once the mounting base is installed, the 2W-B smoke detector attaches to the base by simply inserting the head and turning it clockwise until it locks in place. This chart contains the current list of detectors and UL Listed compatible control units. item 3 System Sensor 2W-B 2WB i3 Series 2-wire Photoelectric Smoke Detector System Sensor 2W-B 2WB i3 Series 2-wire Photoelectric Smoke Detector. Replace the top half of the screen/sensing chamber by aligning the arrow Authorization number, send defective units postage prepaid to: System Sensor, Repair If they are not just take a photo of the connections and land what is connected to the positive connection the new plates positive and same with the negative. Certain System Sensor SWIFT AV bases have the potential to generate a premature and erroneous low battery notification. Comment When low beam is activated, it's possible to change into high beam by pushing the wire remote. has been made tamper resistant, use a small screwdriver to depress the square The i3 Series 2W-B uses drift compensation technology and smoothing algorithms which prevent the smoke detector from becoming too sensitive as dust accumulates. System Sensor i3 series smoke detectors represent significant advancement in conventional detection. All models incorporate a state-of-the-art optical sensing, chamber and an advanced microprocessor. IMPORTANT: This detector must be tested and maintained regularly following NFPA 72 requirements. the 2W-MOD2 installation manual, document D500-4600, for Style D wiring Thanks for using Alarm Grid as a resource.For the purpose of improving our site, wed like to know if you are one of the following: INSTALLATION AND MAINTENANCE INSTRUCTIONS, Series identifier located on the label on the back of the product. Remove the detector cover by turning counterclockwise. System Sensor 2WTA-B specifications Below you will find the product specifications and the manual specifications of the System Sensor 2WTA-B. Physical Specifications You have been registered for product and offer updates. Ensure proper wiring and power is applied. Or should i plan on just running the wire directly out of the drywall? We're here to help with any issues or questions. The ld house alarm system. System Sensor - Technical Field Bulletin Life Expectancy of System Smoke Detectors - Dated 05/2012, Limitations of Fire Alarm Systems - Dated 5/13 Rev. 32 to 120F (0 to 49C) The smoke alarm was perfectly compatible with my 24-year old house alarm system. The conductors used to connect smoke detectors to the alarm control panel and accessory devices should be color-coded to reduce the likelihood of wiring errors. 2WTA-B, or 2WTR-B) on Style D IDCs is to use a 2W-MOD2 module. Press 6.3 oz. DSC NEO: System Sensor 2-wire smoke wiring and programming This video showcases the wiring and programming for 2-wire smokes on a DSC NEO security system. the latest products, and offers. Two-wire models must be used with compatible UL Listed. Green LED. NOTE: Before performing maintenance on the detector, notify the proper authorities that maintenance is being performed and the system will be temporarily out of service. The drop-in ceiling tile speakers, strobes and speaker strobes offer a complete turn-key solution that offers a cleaner and faster installation, reduced labor costs and lower risk than traditional AV notification appliances. Disable the zone Max. System Sensors intelligent and conventional modules are designed to help you meet a wide range of application requirements. In a freeze trouble condition, the red LED will blink once every 10 seconds (refer to Table 1). Operating Temperature Range: The i3 Series detectors include a tamper-resistant feature that prevents removal 1. System Sensor two-wire smoke detectors are marked with a compatibility identifier located on the label on the back of the product. Reinstall the detector and test. What's the Best Place to Install a Smoke Detector. You'll never be more than a mouse click away from the information you need to make informed decisions about our products and their capabilities. 3825 Ohio Avenue, St. Charles, Illinois 60174 5. This chart contains the prevent a system from responding properly in the event of a fire. 4. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must ABOUT US Updates There are no express or implied warranties of any kind with this calculator. (135F) thermal detector and are also capable of sensing a freeze condition if Figure 4: Recessed Test Switch Opening and SENS-RDR Position any latin characters (a-z, A-Z) any numbers (0-9) special characters ("-", "_" and ". 2. If the If the detector is within the listed sensitivity limits, the detectors red LED should light within five seconds. General Description When used with an i3 Series compatible control panel or the i3 Series 2WMOD module (refer to installation manual D500-46-00), the 2W-B and 2WT-B 5.3 inches All System Sensor i3 Series smoke detectors are designed for easy installation, advanced detection and fast inspection. 4. For two-wire models 2W-B and 2WT-B, connect detectors only to compatible alarm control panels as identified by System Sensor's compatibility chart. NOTE: Before testing, notify the proper authorities that maintenance is being Sensitivity Reader tool should be used. Applications Guide for System Smoke Detectors, which provides detailed information on detector spacing, placement, zoning, wiring, and special applications. 3. While the drift compensation and smoothing algorithms make the 2W-B more advanced than other conventional smoke detectors, it will eventually need to be cleaned. SWITCH WITH A Figure 1: Mounting of Detector. Loop verification is provided by the EZ Walk loop test feature. INSTALLATION AND MAINTENANCE INSTRUCTIONS. For best system performance, all wiring should be installed in separate grounded conduit; do not mix fire alarm system wiring in the same conduit as any other electrical wiring. FREE delivery Mar 8 - 10. visual status indication at each detector. item 1 System Sensor 2W-B i3 Series 2-wire, Photoelectric Smoke Detector. Models 2W-B and 2WT-B are 2-wire photoelectric smoke detectors; models 5. Photoelectric smoke detectors work with an alarm system, and when properly maintained and tested, can last for an indefinite period and do not automatically require replacement after a certain period of time like smoke alarms and CO detectors do. Consult NFPA 72, the local Authority Having Jurisdiction (AHJ), and/or applicable codes for specific information regarding the spacing and placement of smoke detectors. 0.3 sec Wired. Hello, I have a vista 20P (came with the house I bought) that has (4) 2 wire smokes wired in. Max. Just fill out the form and click your area of interest. BY THE WORD PAINT, PUSH RECESSED 2. manufacturer on the implementation of Style D circuits. i3 series (4 pages), I3 series. If the detector still fails, it should be replaced. Alarm Contact Ratings: 4. This feature is Please refer to insert for the Limitations of Fire Alarm Systems As long as they operate at 12 Volts DC, they should work. Please read thoroughly System Sensor manual A05-1003, Applications Guide for System Smoke Detectors, which provides, detailed information on detector spacing, placement, zoning, wir-, ing, and special applications. Observe the LEDs on each detector: I recommend powering down the system and placing your system on test mode if monitored before swapping in the new smoke. Light settings: The brightness sensor is activated, it automatically switches between daytime Start-up Capacitance: After power up, allow 80 seconds Smoke Alarm. CAUTION Follow the steps in the Tech Bulletin below to check your current firmware version and update your device firmware if needed.. At a minimum, cleaning should be performed annually. away from the detector. monoxide(co)/photoelectric smoke detector (4 pages), Manual will be automatically added to "My Manuals", Installation and maintenance instructions, Smoke Alarm System Sensor 4WT-B Installation And Maintenance Instructions, Smoke Alarm System Sensor 2WT-B Installation And Maintenance Instructions, Smoke Alarm System Sensor 2WTR-B Installation And Maintenance Instructions, Smoke Alarm System Sensor 2100ARFT Installation Instructions Manual, Smoke Alarm System Sensor 2251EIS Installation And Maintenance Instructions Manual, Smoke Alarm System Sensor 22051E-RF Installation And Maintenance Instructions Manual, Smoke Alarm System Sensor 2112 Installation And Maintenance Instructions, Smoke Alarm System Sensor FSB-200 Installation And Maintenance Instructions Manual, Smoke Alarm System Sensor BEAM1224 Installation And Maintenance Instructions Manual, Smoke Alarm System Sensor 2351E Installation And Maintenance Instructions, Smoke Alarm System Sensor DH100ACDCLP Installation And Maintenance Instructions Manual, Smoke Alarm System Sensor 2100AT Installation And Maintenance Instructions, Smoke Alarm System Sensor 6500S Installation And Maintenance Instructions Manual, Smoke Alarm System Sensor i4 Series COSMO-2W Installation And Maintenance Instructions, Smoke Alarm System Sensor Innovair flex D4120A Installation And Maintenance Instructions Manual. The microprocessor allows the detector to automatically adjust its We're here to help with any issues or questions. Table 1: Detector LED Modes be used in lieu of the tests specified under Testing. These are great replacement detectors. Unlike traditional detection systems, Reflected Beam Smoke Detectors were designed for spacious rooms, open areas, and high ceilings; their innovative features make them popular choices for spaces like warehouses, atriums, arenas, and churches. 32 to 100F (0 to 37.8C) Condition For the effect of polar distribution (rated candela at each angle), the ANSI/UL 1971 minimum percentages are used for the calculations. Alarm Verification* needed" signal. Freeze Trouble (Model 2WT-B and 4WT-B): In wet or excessively humid areas, or next to bathrooms with showers. are capable of generating a maintenance needed signal. testing. B101B / B107B A 120 Enter a zip code, select a range, and choose a Distributor type to locate the nearest Distributor. If the detector is in need of maintenance because its sensitivity has shifted outside the listed limits, the red LED blinks once every five seconds. indicate a need for cleaning, replacement, or a freeze condition (2WT-B only) 6. 0 Any 2-wire i3 smoke detector (2W-B, 2WT-B, 2WTA-B, or 2WTRB) wired It sounds like you may be experiencing a low battery issue possibly. List Price $134.00 Our Price $88.99 You Save $45.01 (34%) The detector will drop Car & Truck Safety & Security Accessories. endstream endobj 473 0 obj <> endobj 474 0 obj <> endobj 475 0 obj <> endobj 476 0 obj <> endobj 477 0 obj <> endobj 478 0 obj <>stream This notification is not a safety issue, but low battery warnings should be addressed promptly to avoid potential problems with system operations which may arise. 32 Degrees to 120 Degrees F. Battery Backup. An overview of latest updates, essential resources, and webinars. Add the hardwired 2W-B smoke detector to most existing alarm system control panels. Figure 3b: Wiring Diagram, 4W-B and 4WT-B 2. Hayden here again from Alarm System Store. photoelectric smoke detector (4 pages), Intrinsically-safe plug-in intelligent photoelectronic smoke detector (6 pages), Single-ended reflected type projected beam smoke detector (19 pages), Single-ended reflected type projected beam smoke detector (14 pages), Air duct smoke detector with extended air speed range (8 pages), Photoelectronic smoke detector with fixed heat and integral temp-3 sounder (4 pages), Reflected type projected beam smoke detector (6 pages), Combination carbon Enter your email address and check your inbox. best system performance, all wiring should be installed in separate grounded Smoke detectors are not to be used with detector guards unless the combination has been evaluated and found suitable for that purpose. they work perfectly and make me feel much more comfortable while i am away. A copy of this list is available from System Sensor upon request. Brightness sensor Mode The sensor is activated. The microprocessor allows the detector to automatically adjust its sensitivity back to the factory setting when it becomes more sensitive due to contaminants settling in its chamber. For convenience, the 2W-B mounting base can also be directly mounted to the ceiling using drywall fasteners. The i3 line redefines installation ease with its plug-in design. ANSI/UL 1971 does not provide ratings for each angle based on actual test results.". Hold a smoldering punk stick or cotton wick at the side of the detector and Consult the list to locate a control module for your specific fire alarm system. After phoning System Sensors toll free number 800-SENSOR2 (736-7672) for a Return NOTE: For the above tests, the detector will reset only after the power source The i3 Series heads and bases are keyed so that a 2-wire head will only mount to a 2-wire base, and a 4-wire head will only mount to a 4-wire base. To a single gang box, or When using the System Sensor 2W-B two wire smoke detector with a VISTA-20P or VISTA-21iP alarm control panel, you should wire the smoke detector to zone one. 46 | Microsoft VP Marcus Fontoura on Architecting Azure, the "World's Computer" 0:00 / 0:00. MOD2 module (refer to installation manual D5 00-46-00), the 2W -B and 2WT -B. are capable of gener ating a "maintenance needed" signal. Operating Voltage: 12/24 V non-polarized nominal, 8.5 min. he EZ Walk loop test must not be used instead of alarm Maintenance You can also remove the detector cover and the sensing chamber for convenient smoke detector cleaning. 23 mA 24 Volt Systems Please include a No. Verified purchase: Yes | Condition: Pre-owned. I've seen three different mri rooms using system sensor 2wb smokes tied to a zone module. The cable companies often use a special adapter to monitor a VISTA-20P system as explained at https://www.alarmgrid.com/videos/how-to-safely-remove-an-icontrol-from-an-existing-system. The mounting base installation is further simplified by. 2. We offer conventional and intelligent products for smoke detection, heat detection, fire and CO combination detection, and multi-criteria / multi-sensor detection, as well as bases and accessories. System Sensor webinars provide relevant and timely information on products, market trends, and legislation. 8. detector to finish the power-up cycle (see Table 2). Do these detectors have a similar lifespan? System Sensor warrants its enclosed smoke detector to be free from defects in materials This device complies with part 15 of the FCC Rules. System Sensor offers world-class fire detection and notification solutions. This latest software also includes an enhanced interface for increased ease of use. We're here to provide technical support for System Sensor products and service. 0 to 95% RH non-condensing Our understanding is that EASE Evac voice evacuation design software from AFMG Technologies is intended to help designers and installers save time and money on voice evacuation systems by enabling them to preplan the system to meet new intelligibility code requirements, reduce costly post-installation changes, and limit over-design. =&5~9KY!m}oC%IF# V. 8.5 8.5 Volts Developed and delivered by Honeywell industry experts, HBU training employs techniques and technologies to help your teams learn everything they can about our products. switch opening; push and hold. It should be straightforward if you do not need to wire the back plate. item 8 System Sensor 2W-B i3 Series 2-wire, Photoelectric Smoke Detector, 5.0 out of 5 stars based on 9 product ratings. SMOKE Do NOT Install Detectors in the Following Areas: In or near areas where particles of combustion are normally present such as kitchens; in garages (vehicle exhaust); near furnaces, hot water heaters, or gas space heaters. Buy the System Sensor 2WT-B here. When the smoke detector is normal the green LED will blink every five seconds. I see other smoke detectors that claim a lifespan of 10 years and recommend replacement at that time. Direct mount or to ceiling using drywall fasteners (Figure 2). Save 6% at checkout. Air conditioners, heaters, fans, and fresh air intakes and returns can drive smoke away from the detector. Unlike traditional detection systems, Reflected Beam Smoke Detectors were designed for spacious rooms, open areas, and high ceilings; their innovative features make them popular choices for spaces like warehouses, atriums, arenas, and churches. Ensure your FAAST device has the most up-to-date firmware. Locking Pin. into the test I will say that it came packaged correctly and it functions as designed, would buy again. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. Initial LED Status Indication. Turn it on by pushing the button of the wired remote. from the end of the feed wire, inserting it into the proper base terminal, and In fact, the 2W-B is a System Sensor i3 series intelligent . After some recent electrical work (new AC unit in the attic) the vista 20p shows fire trouble, and occasionally sets off the alarm. PipeIQ is the free all-in-one system design, configuration, and monitoring software for the System Sensor FAAST line of aspirating smoke detectors, including the new FAAST XT. Series detectors are designed to provide open area protec-, tion. Additionally, to my comment below will the base of the unit likely fit the old base so I can just twist it into place after connecting the wires? InnovairFlex duct smoke detectors combine an impressive collection of innovations to greatly simplify HVAC system monitoring. This includes cleaning, maintenance or screen replacement. OVAL AREA OR AT THE Enter a zip code, select a range, and choose a Distributor type to locate the nearest Distributor. try to correct the interference by one or more of the following measures: RA400Z Remote Annunciator to be connected. Should it become necessary, the screen/sensing chamber is field replaceable. 6. It should connect the same exact way. ey+L) l\q8e)2FWfQCCvBm Yrsza G( Vc Gz;?TP!k5UY6m}*i*OGWfMPMN O_\mV=}gj{sf! tLC>[PWGq9 p System Sensor makes no other express warranty for this smoke detecbe obligated to repair or replace units which are found to be defective because of damage, Our hardwired CO detectors with RealTest use electrochemical sensors to measure carbon monoxide levels and alert residents with a flashing Temp-4 signal alarm. Place control panel or module in EZ Walk Test mode (refer to panel manufacturers manual or 2W-MOD manual D500-46-00). This chart contains the current list of detectors and UL Listed compatible control units. accept any interference received, including interference that may cause undesired operation. and it should be cleaned as outlined in the Maintenance section. Testing Leave everything as is at the panel and simply replace the smoke detector itself. Hold the heat source about 12 inches from the detector to avoid damage Activate the light at the display. The System Sensor 2WTA-B is a 2-wire, photoelectric i3 smoke detector with thermal sensor and built-in sounder. current list of detectors and UL Listed compatible control units. Developed and delivered by Honeywell industry experts, HBU training employs techniques and technologies to help your teams learn everything they can about our products. To remove the detector from the base once it maintenance or screen replacement. Improper connections can item 7 System Sensor 2W-B i3 Series 2-wire, Photoelectric Smoke Detector. System Sensor shall have no liability. NOTE: If, during power-up, the detector determines there is excessive electrical noise in the system such as those caused by improper grounding of the system or the conduit, both LEDs will blink for up to 4 minutes before displaying detector status (see Table 2). Replace the detector cover by placing it over the screen/sensing chamber General Technical details Weight & dimensions Operational conditions Power Power source AC/DC show more Frequently Asked Questions Can't find the answer to your question in the manual? When the sensing chamber gets too dirty and the 2W-B is no longer calibrated to the proper sensitivity, the smoke detector will alert you with a red LED that blinks every five seconds so that you can perform the necessary maintenance. gently blow the smoke through the detector until it alarms. Have feedback about a particular System Sensor product? DETECTOR Page 2 System Sensor two-wire smoke detectors are marked with a compatibility identifier located on the label on the back of the product. Two-wire models must be used with compatible UL Listed panels only. Storage Temperature Range: Wire the mounting base screw terminals per Figure 3a or Figure 3b, as Features include a universal mounting plate with a preliminary snap-in feature to hold the product in place for the screw attachment, 7 field-selectable candela settings for wall and ceiling mount devices, and rotary switches to select horn tone and volume settings. Buy the System Sensor 2WTA-B Smoke and Heat Sensor from Alarm Grid. Thank you for the response @disqus_YuNiL6S1Rn:disqus. Notify the proper authorities when the system is back in service. performed and the system will be temporarily out of service. 1o)!2'1hg'0?,s1e*F 6S(Ft50 AKTX"897cOF 7 Have feedback about a particular System Sensor product? It would be hard to rate this product at one star unless it was somehow responsible for an unreported house fire. Before Installing from the mounting base without the use of a tool. COVER. When the detector is in the, alarm mode, the red LED latches on. to the plastic. Increase the separation between the equipment and receiver. mounted: Proper wire gauges should be used. Please read thoroughly System Sensor manual A05-1003, Applications Guide 3. Copyright 2023 Honeywell International Inc. the temperature is below 41F. Visit systemsensor.com for current product information, including the latest version of this data sheet. 50 detector. In order for this feature, to work properly, the chamber must never be opened while. Twisted pair may be used to provide additional protection against extraneous electrical interference. Consult the list to locate a control module for your specific fire alarm system. By subscribing I give my consent to receive AlarmGrid e-mails about 2W-B Datasheet (PDF) - Systemsensor advanced ideas. H\@}&&u/tc1.|UH*_7]}8s5CC)^.+Jj__}}}weqxes;,64qh{>?bxN}9_iIg]9.oM:,=nKE%ml)R.g")d6KO)\1WK%yaycN,Y`.K3{daal4{=fOW)=#=#=SoB#. of manufacture. *Refer to Electrical Specifications for start-up time in conjunction with panel alarm verification. Max. Therefore, the only 20 mA 12 Volt Systems System Sensor 2WTA-B I3 Series 4-Wire Conventional Photoelectric and 135F Fixed Temperature Thermal Detector with Built-in Sounder, 85 dB Sounder, Form C Relay, Isolated Thermal Sensor. 1. Height (including base): The LED indication must not be used in lieu of the tests specified under Testing. D100-96-00. way to insure proper operation of 2-wire i3 smoke detectors (2W-B, 2WT-B, Models 2W-B and 2WT-B also include an output that allows an optional Model 9H2u*A^Xob`bd`SD+0 vEw Installation of the 2W-B, 2WT-B, 4W-B, and 4WT-B detectors is simplified by Compatible Brand. REMOVABLE The heads and bases are clearly identified as either 2-wire or 4-wire. Peak Standby Current: Air conditioners, heaters, fans, and fresh air intakes and returns can drive smoke The CLSS Tool Suite allows you to perform battery, voltage drop, and Db line loss calculations in a single desktop application. To remove the detector from the base once it has been made tamper resistant, use a small screwdriver to depress the square tamper release tab, located on the skirt of the mounting base, and turn the detector counterclockwise. 2.0 inches Alarm Reset Time: To view our listings, please visit one of the following sites. I would like to replace it with similar 4 wire detector like the 4WT-B detector and wanted to check if they are compatible? All models incorporate a state-of-the-art optical sensing chamber and an advanced microprocessor. For two-wire models 2W-B and 2WT-B, connect detectors only to compatible alarm control panels as identified by System Sensor's compatibility chart. 41F (5C) 135F (57.2C) Notify the proper authorities when the system is back in service. I was planning on installing about 11 of these on a vista 21ip panel, what is the power draw I should account for when planning against the 650 mA allowance for the panel? Wire connections are made by stripping approximately 14-inch of insulation Fire Alarm Systems | System Sensor L-series indoor horn/strobes System Sensor L-series indoor horn/ strobes www.boschsecurity.com u u Plug-in design with minimal intrusion into the back box u Field-selectable candela settings of 15 or 30 cd at 12 V or 15, 30, 75, 95, 110, 135, and 185 cd at 24 V u Horn rated at 88+ dBA at 16 V Rotary switch for horn tone and two volume settings power is applied to the smoke detector. This will get the device to stop sounding. Each i3 Series detector is supplied with a mounting base that can be mounted: 2.To a 312-inch or 4-inch octagonal box, or, 3.To a 4-inch square box with a plaster ring, or. Alarm, Red LED and turning it clockwise until it snaps into place. Should it become necessary, the screen/sensing chamber is field replaceable. Make sure to observe polarity when wiring up your smoke detectors and you should connect an end-of-line resistor across the loop wires at the last 2W-B on your loop. Compatible with 12- or 24-volt systems. Min. A couple of things to note before I have since replaced the battery, which has resolved the smoke error. the use of a mounting base that may be pre-wired to the system, allowing the Test each detector as described in Testing. Direct mount or to ceiling using drywall fasteners (Figure 2). Product specifications subject to change without notice. I will say that it came packaged correctly and it functions as designed, would buy again. Installation of the 2W-B, 2WT-B, 4W-B, and 4WT-B detectors is simplified by the use of a mounting base that may be pre-wired to the system, allowing the detector to be easily installed or removed. For two-wire models 2W-B and 2WT-B, connect detectors only to compatible alarm control panels as identified by System Sensors compatibility chart. Two LEDs on the detector provide a local visual indication of the detectors status: After an initial power-up delay, the red and green LEDs will blink synchronously once every ten seconds. Using a 1000-1500 watt hair dryer, direct the heat toward either of the thermistors. as identified by System Sensors compatibility chart. increase or alter the obligations or limitations of this Warranty. Two LEDs on the detector provide a local visual indication of the detectors status: IMPORTANT: This detector must be tested and maintained regularly following of smoke detectors. Copies of this manual are available, NOTICE: This manual shall be left with the owner/user of this, IMPORTANT: This detector must be tested and maintained regu-, larly following NFPA 72 requirements.

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system sensor 2wb compatibility