Installing a wireless door or window contact sounds simple. It's not always. The magnet has to be within the right gap distance. The sensor has to be transmitting to the panel. The battery has to be live. Three things to verify — and on a standard sensor, verifying any of them means walking back to the panel, watching for a chime, or pulling up the zone list.
Bluefield eliminates that. It's a patented magnetic field indicator built directly into every Versa door/window contact and shock sensor, and it tells you everything you need to know about placement and transmission without leaving the door.
See It in Action
The video above shows how the Bluefield blue LED responds in real time as the magnet approaches the sensor — no panel chime, no second set of hands, no guesswork.
How Bluefield Works: Three LEDs, Three Answers
Bluefield gives you three distinct visual indicators, each answering a specific question during installation.
The Blue LED — "Is the magnet in the right place?"
The most common installation mistake with wireless contacts is magnet placement. Too far from the sensor and the zone won't register closed. Too close to the edge and vibration or slight door movement can cause false trips.
The Bluefield blue LED illuminates the moment the magnet enters the sensor's detection range. You watch the LED, not the panel. Move the magnet into position — the LED lights. That's your confirmation. Commit the tape, move on.
On metal frames where the maximum gap is 1/4 inch, this matters even more. You need to know exactly where "in range" begins, and the blue LED shows you precisely.
The Green LED — "Is the sensor talking to the panel?"
Once the contact is mounted, trip the sensor — open the door or window. The green LED flashes on transmission, confirming that the sensor sent a signal to the panel.
This is the step that traditionally required a walk back to the keypad or a radio call to the person at the panel. With Bluefield, you see the green flash at the sensor and you know the zone is live and communicating. The panel chime is still there if you want it — but you don't need it.
The Red LED — "Is the battery okay?"
The red LED flashes once every five seconds after a trip when the battery is getting low. You'll catch low-battery conditions during commissioning rather than getting a trouble signal weeks later after the customer has moved in.
Which Versa Sensors Include Bluefield
Bluefield is built into every Versa door/window contact and shock sensor:
- MINI-319 — 319.5 MHz door/window contact, Qolsys and GE/Interlogix compatible
- MINI-345 — 345 MHz door/window contact, 2GIG and Honeywell compatible
- MINI-433 — 433 MHz door/window contact, DSC compatible
- SHOCK-319 — 319.5 MHz dual door/window + shock sensor, Qolsys and GE/Interlogix compatible
All four sensors share the same Bluefield LED set: blue for magnet range, green for transmission, red for low battery.
Why It Matters on the Job
The time savings are real. On a typical residential install with 15–20 sensors, eliminating the panel walk-back for each zone adds up fast. More importantly, it reduces the cognitive load of the install — you're not mentally tracking which zones you've verified and which ones you still need to confirm. The sensor tells you directly.
It's also the difference between a clean commissioning walkthrough and a callback. If a zone isn't transmitting during install, you catch it at the door. If the magnet gap is off, you see it immediately. Issues that would show up as trouble signals the day after handoff get resolved before you leave the job.
For new installers on a crew, Bluefield reduces reliance on the panel — which means less radio traffic, fewer interruptions to the lead tech, and faster installs across the board.
The Patent — and What to Look For in the Field
Bluefield is patented technology developed by Versa Wireless. It's not a feature you'll find on standard OEM contacts from other manufacturers — even contacts at higher price points.
If you're in the field and you come across a wireless door or window contact with a blue LED that lights up when a magnet approaches, that's Bluefield. It means you're looking at a Versa-engineered product. No other manufacturer has developed this feature independently — the patent is held by Versa Wireless, and the technology doesn't exist in the broader sensor market outside of products we've built.
So if a blue magnet indicator shows up on a sensor you didn't buy directly from us, now you know where it came from.
Where to Buy
Versa sensors with Bluefield are available for dealer and distributor purchase at wave-electronics.com. All four SKUs are in stock.
