Honeywell 5821 Posts

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Hi DIYers! It's hard to believe, but it's already May. Time sure flies doesn't it? Summer is quickly approaching and now is a great time to buy temperature sensors for your home. This way, you can be quickly notified if your home's AC system is ever not cooling the building properly.

Honeywell 5821 wireless temperature sensor and water sensor exte

Temperature sensors aren't just for letting you know about low-temperatures. They can also let you know about unusually high temperatures that would only occur if the AC went out. This is great for ensuring that the house you come home to is nice and comfortably. There's nothing worse than ending your day only to find that your AC went out and your home is uncomfortably hot! Our temperature sensors are also great for pairing with smart thermostats, which can often send you remote alerts when temperatures go outside certain thresholds.

Today, we're taking a look at three temperature sensors that you might consider adding to your system. We'll be focusing on the high-temperature sensing capabilities here, but we may brush over other features as well. Let's take a look!

Honeywell 5821

The Honeywell 5821 has two possible temperature settings. If programmed as Loop 2 with both DIP switches OFF, the sensor will alert the system when the temperature rises above 95°F for more than 10 minutes. You can also set it to SW1 DIP Switch ON and SW2 DIP Switch OFF on Loop 2 to have the sensor activate when the temperature rises above 75°F for more than 10 minutes.

The option to choose between a 95°F and a 75°F threshold is very useful, as some homes in different areas will certainly have different normal temperatures! The sensor also offers freeze detection and flood monitoring when paired with a water detection probe. An optional wired temperature probe is also available. The device operates at 345 MHz.

Qolsys IQ Temp

The Qolsys IQ Temp offers high-temperature detection at 100°F. The zone will then restore when the temperature falls below 95°F. Although this might be too high for many homes, there are some very hot areas that frequently exceed 110°F or even 120°F. This is a relatively simple device that can easily pair with nearly any 319.5 MHz alarm system. It also offers freeze detection at 40°F and restores once the temperature rises above 45°F. Like most temperature sensors, the high and low temperature zones will need to be configured separately.

2GIG FT6-345

The 2GIG FT6-345 Wireless Flood and Temperature Detector is a 345 MHz sensor designed with 2GIG Security Systems in mind. The sensor uses Loop 2 for high-temperature detection. It activates when a temperature of 95°F or higher is detected for three straight minutes. The sensor will restore when the temperature falls below 95°F for three straight minutes. The sensor can also be programmed with Loop 1 for freeze detection (41°F or lower for three straight minutes) or Loop 3 for water detection.

If you need help choosing a high-temperature detector for your home, please reach out to us! We can help you determine the best solution for your needs. The best way to reach us is to email support@alarmgrid.com. We will check your email at our earliest convenience and respond back as quickly as possible. We look forward to hearing from you!

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Just last week, Resideo purchased startup company Buoy Labs. This is the first acquisition from Resideo since the company completed its spin-off from Honeywell in October of last year. The purchase of Buoy Labs should greatly assist Resideo in its technology for environmental sensors.


Buoy Labs is best known for its smart home products that allow users to track the amount of water they use and quickly identify leaks. Their lineup fits in perfectly with Resideo. The company already offers many great flood detecting sensors. These include the Honeywell 5800FLOOD and the Honeywell 5821 when used with a Honeywell 470PB Probe or Honeywell FP280 Probe. Many of our monitored customers use these sensors to receive alerts in the event of a water leak. They can then take action before serious water damage occurs. This equipment works great with the wireless panels from Resideo, including the Honeywell Lyric Controller.

We believe that this acquisition will help Resideo make fantastic strides in its offering of environmental sensors, particularly for flood sensors. Buoy Labs has an impressive portfolio of smart home water management and water leak detection products. Resideo has cited industry studies claiming that homeowner's insurance companies pay more than $9 billion in water damage claims every year. The average claim is roughly $9,000. With the purchase of Buoy Labs, we expect that Resideo will achieve great success in reducing these figures and preventing house floods. And if you still don't think flood sensors are important, think again.

Alarm Grid will certainly keep you up-to-date with the latest news regarding any new environmental or flood sensors released from Resideo. This acquisition means Resideo has some big plans in store, and we are very excited to see what the future holds. Stick with Alarm Grid as we move forward in the exciting worlds of security, property protection and home automation!

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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 Alarm.com. 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 support@alarmgrid.com, 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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We strive to have some of the best pricing on the internet for security products. When prices are reduced for us, we do our best to quickly pass off those savings to anyone who has made a purchase here.

In the last week, we have reduced the prices on over 100 items an average of 6%. Our Lyric kits have all seen price reductions between 6% and 19%.

Below is the list of all items whose price has been reduced. We hope you enjoy the savings!

URL Old Price New Price % Change
Honeywell K4563 2.99 0.99 202%
UltraTech 1240 14.99 8.99 67%
Honeywell 5881ENM 126.99 77.99 63%
Honeywell 5881ENH 198.99 128.99 54%
System Sensor CO1224T 83.99 54.99 53%
UltraTech 1270 29.99 19.99 50%
Honeywell WAP-PLUS 95.99 63.99 50%
Leviton VRS15-1LZ 92.99 66.99 39%
Honeywell 719 17.99 12.99 38%
Honeywell 5802WXT-2 53.99 38.99 38%
Honeywell 5802WXT 53.99 38.99 38%
Honeywell 5815 47.99 34.99 37%
Honeywell 5899B 3.99 2.99 33%
Honeywell WAVE2 11.99 8.99 33%
Interlogix 600-1048-XT-ZX-AT 117.99 90.99 30%
Interlogix 600-1048-XT-ZX-VZ 117.99 90.99 30%
Honeywell L3000 199.99 155.99 28%
Honeywell SIXSIREN 78.99 64.99 22%
Honeywell SIXGB 78.99 64.99 22%
Honeywell 702 22.99 18.99 21%
Honeywell 955PST 5.99 4.99 20%
Honeywell GSMVLP5-4G 162.99 135.99 20%
Alarm Grid LYNX-WEXT 87.99 73.99 19%
Honeywell LyricPK-VZ 522.94 439.99 19%
Yale YRD210 246.99 207.99 19%
Honeywell LyricPK-AT 518.64 439.99 18%
Honeywell L7000PK10-WIFI-3G 639.99 550.99 16%
Honeywell LyricPK10-VZ 672.11 578.99 16%
Honeywell GSMV4G 187.99 161.99 16%
Alarm Grid LYNX-EXT 145.99 125.99 16%
Honeywell LKP500 119.99 103.99 15%
Honeywell 5881ENL 67.99 58.99 15%
Honeywell LyricPK 448.52 389.99 15%
Honeywell L7000PK10-WIFI 529.99 461.99 15%
Honeywell L7000PK-WIFI 399.99 348.99 15%
Honeywell GSMV4G-TC2 199.99 174.99 14%
Honeywell LyricPK10-AT 660.99 578.99 14%
Honeywell LyricPK10 614.99 541.99 13%
Honeywell L7000PK-WIFI-3G 499.99 442.99 13%
Honeywell L7000 279.99 249.99 12%
Honeywell GSMX4G 141.99 126.99 12%
Honeywell WAP-ANT5DB 9.99 8.99 11%
Honeywell GSMX4G-TC2 154.99 139.99 11%
Honeywell 5819WHS 64.99 58.99 10%
Honeywell 300-07052 10.99 9.99 10%
Honeywell Lyric Controller 299.99 272.99 10%
Honeywell iGSMV4G 190.99 174.99 9%
Honeywell 5800C2W 84.99 77.99 9%
Honeywell 4232CBM 115.99 106.99 8%
Honeywell 1361-GT 12.99 11.99 8%
Honeywell 6148 66.99 61.99 8%
Honeywell 5800RPS 53.99 49.99 8%
Honeywell 4204 82.99 76.99 8%
Telguard TG-1 Express 174.99 162.99 7%
SkyBell DBCAM 207.99 193.99 7%
Honeywell K14139 14.99 13.99 7%
Honeywell SiXCT 25.66 23.99 7%
Honeywell Lyric-CDMA 104.24 97.99 6%
Honeywell 747PD 16.99 15.99 6%
Honeywell 4229 102.99 96.99 6%
Honeywell Lyric-3G 103.99 97.99 6%
Honeywell SiXPIR 58.28 54.99 6%
Honeywell 5834-4EN 54.99 51.99 6%
Honeywell AD12612 19.99 18.99 5%
Honeywell 5822T 42.99 40.99 5%
Honeywell 6149EX 69.99 66.99 4%
Honeywell WA7626-CA 23.99 22.99 4%
Honeywell 4208U 97.99 93.99 4%
Honeywell 5883H 245.99 235.99 4%
Honeywell 5800WAVE 102.99 98.99 4%
Honeywell 5800RP 103.99 99.99 4%
Honeywell 5800Micra 53.99 51.99 4%
Honeywell ACU 134.99 129.99 4%
Honeywell IS280CM 82.99 79.99 4%
Leviton VRF01-1LZ 141.99 136.99 4%
Honeywell VISTA-20P 144.99 139.99 4%
Honeywell 710 31.99 30.99 3%
Honeywell 5800PIR 97.99 94.99 3%
Honeywell iGSMV4G-TC2 199.99 193.99 3%
Honeywell L5210PK10-WIFI 451.99 438.99 3%
Honeywell LYNXRCHKIT-SHA 34.99 33.99 3%
Honeywell IS25100TC 39.99 38.99 3%
Honeywell 5806W3 79.99 77.99 3%
Honeywell ZWSTAT 159.99 155.99 3%
Honeywell L5210 199.99 194.99 3%
Honeywell L5210PK10-3G 487.99 475.99 3%
Honeywell VISTA-21iPSIA 212.99 207.99 2%
Honeywell VISTA-21iP 212.99 207.99 2%
Honeywell FG1625F 44.99 43.99 2%
Honeywell FG1625 44.99 43.99 2%
Honeywell 4219 89.99 87.99 2%
Honeywell L5210PK-WIFI 322.99 315.99 2%
Honeywell 748 46.99 45.99 2%
Honeywell FG1625RFM 48.99 47.99 2%
Honeywell 748LC 48.99 47.99 2%
Honeywell SIXFOB 25.51 24.99 2%
Honeywell 5821 52.99 51.99 2%
Honeywell 5800PIR-COM 107.99 105.99 2%
Honeywell FG730 56.99 55.99 2%
Honeywell L5210PK10-WIFI-3G 537.99 528.99 2%
Honeywell L5210PK-3G 364.99 358.99 2%
Honeywell VISTA-128BPT 379.99 373.99 2%
Honeywell CE3 64.99 63.99 2%
Honeywell 5898 133.99 131.99 2%
Honeywell 5828V 134.99 132.99 2%
Honeywell 5816OD 71.99 70.99 1%
Honeywell 5869 84.99 83.99 1%
Honeywell 5800RL 85.99 84.99 1%
Honeywell L5210PK 272.99 269.99 1%
Honeywell L5210PK-WIFI-3G 414.99 410.99 1%
Honeywell 6164US 211.99 209.99 1%
Honeywell GSMVLP4G 149.99 148.99 1%
Honeywell IPCAM-WO 287.77 285.99 1%
Honeywell IPCAM-PT2 273.99 272.99 0%
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