Honeywell FG1625RFM

Round Flush Mount Glass Break Detector

Honeywell fg1625rfm round flush mount glass break detector
  • Honeywell fg1625rfm round flush mount glass break detector
  • Honeywell fg1625rfm exploded round flush mount glass break detec

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The Honeywell FG1625RFM is a found flush mounted glass break detector. The FG1625RFM is designed to quickly and easily be recessed into a...
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The Honeywell FG1625RFM is a found flush mounted glass break detector. The FG1625RFM is designed to quickly and easily be recessed into a 1” diameter hole in the wall, providing a very small profile with Honeywell’s ultimate glass break detection technology. The FG1625RFM has four sensitivity settings that can be set using the dip switches, allowing you to customize your installation to match the type of windows to be protected, distance to the detector and the acoustic features of the room.

To mount the Honeywell FG1625RFM, drill a 1” diameter hole into a false ceiling or sheet rock. The sensor requires a minimum depth of 2.75” from the surface of the wall or ceiling. Pull the four wires from your Honeywell wired security system through the hole in the wall, and through the back of the wall sleeve. Slide the wall sleeve into place, ensuring the “TOP” marking is properly aligned. Connect the four wires to the detector, and slide it into the wall sleeve, and then snap the front cover into place. Ensure that the FG1625RFM is mounted at least 6’ away from the floor and 3’ from sirens, bells and air ducts. The FG1625RFM must be mounted within 25’ of the protected glass, and in clear view.

Glass break sensors are the ideal way to protect the perimeter of your property. Motion detectors will only pick up a criminal once they have entered the property, and cannot be armed in the stay mode to prevent you from accidentally tripping your own system. The Honeywell 1625RFM glass break allows you to protect your windows at the point of entry, whether you are at home sleeping, or on the road. The Honeywell FG1625RFM is the ultimate low profile glass break sensor, and is designed to be nearly unnoticeable. The FG1625RFM can be easily tested for range and reliability using the FG701 glass break simulator. Get the ultimate in Honeywell’s FlexGuard glass break technology in the most subtle mounting design available with the FG1625RFM.


We haven't had any reports of poor performance on the FG1625RFM and both units use the same type of technology to detect broken glass so you should be confident using either unit.
I had the larger ones and replaced them with the flush mount. They look so much better. They are sensitive, ours are set to medium sensitivity and if I am near one when opening a can of soda it will trigger. I just realised I had posted this a year or 2 ago below, but Joe had given me a tip about the spray and it worked. One thing I've found with these is that the screw contacts need to have some CRC solvent sprayed on them. I went through a 3 year period where they would randomly fail during cold weather. Everytime, the wires has corroded and lost contact in the cold, setting it off, usually at 3am. It appears they are very sensitive to humidity and moisture so after cleaning the corrosion and spraying with CRC electrical cleaner, I wrapped the terminals in electrical tape. Never had a problem since I did that. And thanks Joe! Best of luck.
Are there any disadvantages to the 1625RFM compared to say a FG1625? I’m skeptical about the FG1625RFM’s small size - do they work as good as the bulkier FG1625? Thank you.
It definitely does look like the wires are corroded. The wire being stranded won't have make much of a difference. What you could do is apply a bit of anti-oxidation fluid on the wire and terminals. This will prevent them corroding.
Hi Joe, I have found the cause. It is not the unit itself failing, but corrosion on the connectors and wires. As i was removing it, just wiggling the wires made it fail. It appears that the corrosion is causing intermittent contact when the wires shrink in the cold. The wiring is cat5 cable, stranded not solid core. Wonder if thats the problem. I attached a photo. Cheers, Andrew
In the installation manual for the device, it says that the operating range for the unit is from 14° to 131°F. It sounds like they are getting too cold to operate.
I have these mounted in the ceiling about 2 feet away from the wall. These fail on me every winter when the outside temp gets below 20F. Once they fail, it the temp goes up, they start working but then immediately fail again when it cools down. Anyone know why these would fail consistently every winter?
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