System Sensor 2WTA-B Posts

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Hi DIYers! We know it has been awfully chilly out there lately. We thought it would be a good time to talk about freeze sensors and the benefits they provide. These devices are strongly recommended for anyone who lives in a colder area who wants to make sure their home is kept temperate.

Honeywell 5821 wireless temperature sensor and water sensor exte

Also called temperature sensors, freeze sensors alert a security system when the ambient temperature falls below a certain threshold. Usually, this is around 40 degrees Fahrenheit. That way, the user can take proper action to prevent their pipes from freezing. Remember, water freezes at 32 degrees Fahrenheit, and serious damage can occur if nothing is done in time. There are all sorts of horror stories of this happening while people are away for the day or on vacation.

Freeze sensors are particularly useful when used with an interactive service platform, such as Total Connect 2.0 or These services will provide you with mobile alerts so that you will know if a situation occurs while you are away. Nearly every panel we sell can connect with one of these services. You just need the right communicator and monitoring plan.

While there are some standalone temperature sensors, freeze detection is often a secondary feature on a device. In fact, you might already have a device with freeze detection capabilities in your home and not even know it! The feature is commonly found on smoke detectors and flood sensors, so it never hurts to find out if your existing devices can also do freeze detection. For multi-function devices, freeze detection will usually operate on a specific Loop Number, and a unique system zone for freeze detection must be programmed.

Qolsys iq temp temperature sensor for low %3c40 and high %3e100 temp

If you're in the market for a new freeze sensor, you have plenty of options to choose from. The main thing to keep in mind is whether or not the device will work with your security system. If you are looking for a wireless sensor, then it must communicate at a compatible frequency. If you go the hardwired route, then your system must be able to support hardwired sensors. You might consider getting a smoke detector or a flood sensor that also includes the freeze detection function.

If you have a Honeywell or 2GIG System, then you likely use 345 MHz Sensors. The Honeywell 5821 is a convenient option for reliable freeze detection. You can also add a probe to have the 5821 Sensor double as a flood sensor. If you want a combination smoke and heat detector with freeze detection built-in, you might consider a Honeywell 5808W3.

For Interlogix Systems and the original Qolsys IQ Panel 2, you will want a 319.5 MHz Sensor. The Qolsys IQ Temp is a viable option. There's also the Interlogix TX-E611, which doubles as a flood sensor. For users also looking for a smoke, the Interlogix SDX-135Z also provides freeze detection.

If you have a Qolsys IQ Panel 2 Plus or a DSC PowerSeries Neo, then your system supports PowerG Sensors. In that case, you might go with the DSC PG9905. This sensor will offer the impressive range of PowerG, as well as extremely secure 128-bit AES encryption.

For users who want to go the hardwired route, the best bet is often to go with a smoke detector that includes the feature. We often steer customers towards 2-wire smokes, since they are easier to set up. A good option is the System Sensor 2WTA-B, which also includes a built-in sounder.

Users who are having trouble deciding on a freeze sensor can always reach out to Alarm Grid. We are happy to help you find the perfect device for your needs. You may email us at, or call us at (888) 818-7728 from 9am to 8pm EST M-F. We look forward to hearing from you!

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Hi DIYers! Today, we're taking a look at why one-go-all-go smoke detectors can help ensure that everyone in the building is alerted during a fire. Simply put, a one-go-all-go smoke detector will cause all of the other compatible smoke detectors on the system to activate at the same time.

Dsc fsb 210bt 2 wire addressable photoelectric smoke and heat de

Having all the smokes in your home activate at the same time can be crucial for ensuring that everyone is alerted in the event of a fire. This is especially true for larger homes that need several smoke detectors for complete coverage. Most alarm systems can have some type of interconnected one-go-all-go smoke detector network. However, implementing this feature properly can be difficult, and it requires additional equipment and wiring. Another important thing to remember is that the one-go-all-go feature is best achieved by using the same detector model across the network.

For those with wired alarm control panels, there is often a way to achieve a one-go-all-go setup using hardwired smokes. This is possible with both 2-wire smokes and 4-wire smokes, but both require the proper equipment. Many wired panels offer a way to conveniently reset the zone used for 2-wire smokes after a fire alarm has been cleared. This is necessary for getting the smoke detectors to stop sounding and to reset the detector so that it can trip again, if necessary.

For the Honeywell VISTA Panels, all 2-wire smokes must go on zone 1. This zone will automatically reset, and power will be briefly dropped to the smokes after the alarm is cleared. Multiple 2-wire smokes are wired together in parallel, with an end of line resistor (EOLR) for wiring supervision. A good 2-wire smoke detector to use is the System Sensor 2WTA-B, which also includes a built-in sounder.

System sensor 2wta b 2 wire smoke detector with fixed heat and s

Unlike 2-wire smokes, 4-wire smokes have less restriction regarding where they can be wired. In fact, a 4-wire smoke on a Honeywell VISTA System will generally go on any hardwired zone, except for zone 1. Again, the smokes can be configured for a one-go-all-go setup, but this will require additional equipment and wiring. This also allows the smokes to take up fewer systems zones, as they can all use the same zone and programming settings.

One downside to using 4-wire smokes is that they often require additional resources to work properly. In order to get a 4-wire smoke to stop sounding, power to the device must be dropped. But unless the system has a built-in relay, this cannot be done without additional hardware. This can require an external relay, and possibly an additional power supply as well. Proper operation will also require an end-of-line power supervision relay to check whether or not power to the smokes has been interrupted. If you do decide to go the 4-wire route, the System Sensor 4WTA-B is a good option.

System sensor 4wt b 4 wire smoke detector with fixed heat sensor

More recently, certain wireless smoke detectors also offer one-go-all-go functionality. Honeywell really took the initiative here by making their Lyric SiXSMOKE Sensor a one-go-all-go device. This sensor is exclusively compatible with the Honeywell Lyric Alarm System, and provides a very easy way to achieve a robust one-go-all-go setup. One-go-all-go is also compatible with the new Honeywell SiXCOMBO, which also offers heat and CO detection.

Honeywell sixsmoke wireless smoke slash heat detector for lyric

If you have a different wireless system than the Lyric, then there might still be way to attain a one-go-all-go setup. In most cases, this will require using 4-wire smokes with a compatible wireless transmitter. The transmitter will need to be able to support Normally Open (NO) life-safety devices with an end of line resistor. However, this is not possible for every wired-to-wireless converter.

Additionally the standard equipment for any 4-wire smoke is also required. This includes a relay, power supply and resistor. One transmitter that will work for this application is the Honeywell 5817CBXT. This module is part of the Honeywell 5800 Series, and it will work with nearly any alarm system that accepts the 345 MHz wireless frequency. Remember, the transmitter or converter must communicate at a frequency accepted by the alarm control panel.

Honeywell 5817cb wireless commercial sensor

Additionally, Qolsys recently released the Qolsys IQ Hardwire 16-F for 319.5 MHz systems. This is a 16-zone wired to wireless converter that is great for bringing over hardwired sensors to a newer wireless system. Zone 16 on the module is a Normally Open loop specifically designed for 2-wire smokes. The loop will support up to ten 2-wire smoke devices, which are wired in parallel with an end-of-line resistor. This revolutionary module represents the first way to bring 2-wire smokes over to a wireless all-in-one system. The necessary resistors come included with the module.

Qolsys iq hardwire 16 s qs7131 840

Additionally, if you have an existing network of high-voltage smokes, you can integrate them into a wireless system using a takeover module. These are devices that listen for the unique temporal sound of an activated smoke detector. If the existing smoke detector network is one-go-all-go, a single takeover module can accommodate the entire network. Alarm Grid offers takeover modules that operate at the 319.5 MHz (Interlogix/GE and Qolsys), 345 MHz (Honeywell and 2GIG) and 433 MHz (DSC) wireless frequencies. That way, you can conveniently take an exiting high-voltage smoke network and start using it with your new wireless security system!

If you need help choosing smoke detectors for a one-go-all-go setup, please don't hesitate to reach out to us! We can help you determine the perfect fire-protection devices for your security system. You can send an email to, or you can call us at (888) 818-7728 during our normal business hours of 9am to 8pm EST M-F. We look forward to hearing from you!

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