Bought 3 of these, they are incredibly unreliable, not registering the correct state constantly. I tried setting one up with an external sensor.... that also does not work. Save your money an avoid this sensor.

It does have terminals for an external sensor and they do work, however it needs to be enabled through configuration and does not disable the reed switch.

In home-assistant the configuration is available on the z-wave node config options section. Make sure to wake the device up with the tamper switch while changing the setting.

You will need to either short the reed switch or keep it closed with a magnet at all times for the external switch to work properly. I hot glued a smaller magnet in place.

setup took several tries to get it to join my hubitat but it did eventually and is working

It works with smartthings hub 2018. This sensor is not in the list of support brands in smarttings app. Just choose one of the brand in the list has Z wave device can link it to smartthings. Once it is linked, it works perfectly. I use it as garage door sensor. It works every time.

They are reliable and work perfectly! I think this is the one to get thank to the CR123A battery.

I purchased with the intent to solely use the 'external sensor' terminals only: I didn't care about the magnetic sensor part (i.e. I wanted the sensor to trigger with a simple CLOSE event of the contact wires), which worked beautifully!

First things first, you have to enable the external sensor via your automation platform (I use Openhab) - They're disabled by default . For me, I had to then remove and re-install the battery for the setting to take effect. The software reported the change was applied, but, it wasn't until I took the battery out and back in that the external sensor contacts functioned.

I taped the magnet part to the side of the sensor body so it will always be there: This is required in my case because the sensor will only show CLOSED when the magnet is in proximity to the sensor !!AND!! the terminal contacts are closed. If just one is OPEN, then the sensor will read OPEN.

Although I didn't need it, the magnetic sensor part looked like it would perform well enough. If you must know what I used this for... I've used them for two things:

1) I installed a relay on my smoke detectors, connected through Interconnect, that creates a CLOSE condition on two of its wires. I connected these to this sensor - Boom, automation communication with ALL of my smoke detectors.

2) I needed to install a wall switch to control a newly installed recessed can light, and it was impossible to get any kind of cable to the location we wanted the switch. I wired the light to a smart switch in the attic. Then I cut in a single gang box at the problematic location and installed an old fashioned ON/OFF wall switch. - connected to this sensor inside the switch box. Through automation rules, I can now control the light above.

I struggled to get it associated with my zwave controller. I'm alao looking for more documentation. The pamphlet included doesnt offer much

I love these no logo door and window sensors. They pair very easily to my Vera Plus controller and work every time.

Does not work with my wink v1 hub. Maybe it will work with other z wave devices but not wink

I bought this product for a particular reason. The fact that it supported an external switch connection! My specific application was to install it in my mailbox so my HomeSeer 3 system could notify me when the mail had been delivered. What I failed to come to grips with was how to "ACTIVATE" the external sensor mode of this device from my HomeSeer 3 software. I read everything I could get my hands on online before asking BOTH Monoprice and HomeSeer HOW to do it. HomeSeer didn't have one of these to work with. Monoprice didn't have HomeSeer s/w. So I was stuck with cutting the relay out of the circuit and soldering in my wires to connect with the external relay. Certainly not as elegant a solution as I initially planned. I was very disappointed in both product support staffs.