Install Technology
Bluefield confirms the install at the sensor — no walk back to the panel.
Installing a wireless contact means verifying three things: the magnet is in range, the sensor is transmitting to the panel, and the battery is good. On a standard sensor, checking any of them means walking back to the panel and watching for a chime. Bluefield — Versa's patented magnet-indicator technology — puts those answers on the sensor itself, so you confirm placement and signal at the door.
See it in action
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 three visual indicators built into the sensor. The blue LED means the same thing on every Bluefield-equipped sensor; the green and red LEDs are used differently on the door/window contacts than on the SHOCK-319 (see the table below).
Blue — "Is the magnet in the right place?"
The most common contact-install mistake is magnet placement: too far and the zone won't read closed; too close to the edge and slight movement causes false trips. The blue LED lights the moment the magnet enters detection range — watch the LED, not the panel, set the magnet, commit the tape. It's especially useful on metal frames where the gap maxes out around ¼″ and you need to know exactly where "in range" begins.
Green — "Is the contact talking to the panel?" (door/window sensors)
On the MINI door/window contacts, trip the sensor and the green LED flashes on transmission, confirming the signal went out. That's the step that used to require a walk back to the keypad. The panel chime is still there if you want it — you just don't need it.
Red — "Is the battery okay?" (door/window sensors)
On the MINI contacts, the red LED flashes once every five seconds after a trip when the battery is getting low — so you catch a weak cell during commissioning instead of as a trouble signal weeks after handoff.
LED meaning by sensor
| LED | MINI-319 / MINI-345 / MINI-433 (door/window) | SHOCK-319 |
|---|---|---|
| Blue | Magnet in range | Magnet in range |
| Green | Transmission confirmed | Pre-shock (near threshold) |
| Red | Low battery | Shock alarm |
Which Versa sensors include Bluefield
- MINI-319 — 319.5 MHz door/window contact (Qolsys, GE/Interlogix)
- MINI-345 — 345 MHz door/window contact (2GIG, Honeywell/Resideo)
- MINI-433 — 433 MHz door/window contact (DSC 433 MHz)
- SHOCK-319 — 319.5 MHz door/window contact + shock sensor (Qolsys, GE/Interlogix)
The motion detectors (PIR-319, PIR-DUAL) have no magnet or reed switch, so Bluefield doesn't apply to them.
Why it matters on the job
On a 15–20 sensor residential job, skipping the panel walk-back for each zone adds up — and it lowers the cognitive load, because the sensor tells you directly which zones are verified. It's also the difference between a clean walkthrough and a callback: a non-transmitting zone or an off magnet gap gets caught at the door instead of showing up as a trouble signal the day after handoff. For newer techs it means less radio traffic and fewer interruptions to the lead.
Bluefield is Versa's branded magnet indicator
"Bluefield" is Versa Wireless's trademark for its patented magnet-placement indicator. It's engineered into every Versa door/window contact and shock sensor, and it's an uncommon feature on typical OEM contacts — most wireless contacts give you no on-device feedback at all, so you're stuck confirming placement and signal at the panel. With Bluefield, the sensor does the talking.
Confirm magnet placement and signal at the door — not at the panel.
Where to buy
Versa sensors with Bluefield are available to licensed dealers and distributors through WAVE Electronics. See the full door/window and shock sensor lineups, or read the panel compatibility guide on Insight.
Frequently asked questions
What is Bluefield on a Versa sensor?
Bluefield is Versa Wireless's patented magnet-indicator technology — a set of on-device LEDs that confirm magnet placement and signal right at the sensor, so an installer doesn't have to walk back to the panel to verify a zone. It's built into every Versa door/window contact and the SHOCK-319.
What do the Bluefield LED colors mean?
Blue means the magnet is within range on every Bluefield-equipped Versa sensor. On the door/window contacts (MINI-319/345/433), green confirms a transmission to the panel and red indicates low battery. On the SHOCK-319, green indicates a pre-shock (near the alarm threshold) and red indicates a shock alarm.
Which Versa sensors have Bluefield?
All of Versa's door/window contacts — the MINI-319, MINI-345, and MINI-433 — plus the SHOCK-319 shock + contact sensor. The blue magnet-range LED works the same across all of them. The PIR-319 and PIR-DUAL motion detectors do not have Bluefield, since they have no magnet.
Does the blue LED replace the panel chime during install?
It can. The blue LED confirms magnet placement at the sensor and the green LED confirms transmission, so you don't need to watch the panel or have a second person at the keypad. The panel chime still works if you prefer to use it.
