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Discussion Starter · #1 ·
It looks like I have to send my Lasermax Gripsense laser back for service/replacement.

I attached it, adjusted the aim, switched it to grip sense activation mode, and it had functioned normally as far as I could tell. Turned itself on when the grip is held, went off immediately when released. Seemed pretty foolproof as long as I kept a body part or piece of metal away from the sensor, it stayed off.

I finished running errands yesterday (88 degrees, 76% humidity, un-airconditioned car, fan on full blast, I was sweaty but the firearm only had sweat on the side of the grip facing my body), took my IWB holster out of my belt and set the pistol and holster down to put it away. I noticed the green dot on the wall and thought, "That shouldn't be on... ...and the dot looks a little less bright than normal... ...uh-oh...".

I got it out of the holster, hit the button on the side, and turned the laser off. It no longer seemed to be in gripsense activation mode. I held the two buttons down, it flashed once, and acted like it was in button activation mode. Held the buttons down again, got three flashes, appeared to still be in button activation mode.

Pretty quickly, the battery went flat. I got out my spare and installed it. After about fifteen minutes of button pushing, it seemed to go back into Gripsense activation mode, at least to turn on. But it would not turn off when my hand was moved away from the sensor. It would stay on and would not turn off until manually turned off with the button.

The contact page for Lasermax's website wanted the serial number, so I had to remove the laser from the pistol to find it on the inside. Everything looks clean, dry, and as original, on the inside. But, while filling out the contact form and describing the malfunction, the laser started acting completely normal, turning on and off with the sensor. I reattached it to the pistol, and set it to manual activation.

This morning I got an email from Lasermax with options of talking to them on the telephone or mailing the laser back for service/replacement. I am inclined to not trust it and send it back. I kind of scoffed at the comments that the battery would be dead when needed, because the batteries last an amazingly long time, as long as the laser is not on and lighting up a dot on the inside of your pants while you walk around all day long.

Not sure what to suspect as the culprit. Temperature? Humidity? Sweat?
 

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Discussion Starter · #2 ·
I managed to get a second LaserMax laser delivered, and shipped the first back to LaserMax.

I caught the second one stuck on, in similar circumstances. A warm and humid day. I was leaving my last stop and an older fellow walked up and wanted to talk. He had me stuck, talking to him through the window of the hot car, for a good 15 minutes before I could politely end the conversation and get on my way. Got home, pulled the holstered pistol out of my waist band, and the laser was lit up without a hand next to the little sensor.

This time I could see moisture on the grip and trigger guard. Wiped it away, and the laser went off.
I tested it again after everything thoroughly dried. I got a piece of fabric, put a few drops of water on the corner, waved it past the sensor on the trigger guard, and the laser lit up.

So, moisture around the sensor is going to turn on the gripsense lasers.
 

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Discussion Starter · #3 ·
I think I have figured out what is causing this issue.

I started checking the laser while wearing the holster. Caught it on a couple times after wearing it while driving the car. I checked the area around the sensor. The holster leaves the bottom edge of the trigger guard exposed. There is not a lot of grip length on a compact pistol, and leaving the guard uncovered makes sense for getting an initial correct hand hold on the grip without having to readjust after drawing. However, this also leaves the sensor exposed. With an IWB holster, the uncovered trigger guard is ending up pressed against the abdomen (gut / love handle). And the laser is turning on while the pistol is in the holster.

I think my solution is to heat bend a little piece of kydex to cover the bottom of the trigger guard and plastic weld it onto the holster. I am not sure if that will be adequate. I tested the sensitivity/range of the sensor with a couple small pieces of abs plastic between my finger and the trigger guard, and it is turning on with a 1/8th inch thick piece. That is about double the thickness of the kydex used in the holster. I will have to leave a gap so that the pistol can be placed into and removed from the holster without interference. And it can't stick out so much it interferes with the grip. Some figuring to do.
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