Name: Verkada QM21-W Wireless Ceiling Motion Sensor
Brand: Verkada
Availability: InStock

Overview

The Verkada QM21-W is a wireless ceiling-mount motion sensor for Verkada Alarms with 360° coverage. It uses dual-technology detection — a PIR sensor plus X-band microwave radar — so an alarm requires both to agree, which cuts the false trips that catch single-technology sensors.

360° field of view with a 29.5ft / 9m detection range from a ceiling mount
Dual-technology sensing: passive infrared and X-band microwave radar
Connects automatically to the nearest VLink hub — BP32, BP42, BP52, BK22, BE32, WH32 or WH52 — with no manual pairing
2,000ft (600m) open-field line-of-sight wireless range over VLink, Verkada's sub-GHz protocol
Runs on two included lithium AA batteries with 5-year typical battery life; no wiring to the device
Breakaway-tab tamper switch, plus an install-mode LED that shows dual motion, thermal motion and hub-search state
Remote visibility of live and historical activity, signal strength and battery level in Command; mute a sensor for a set period
FCC and IC certified, 10-year warranty

Panel and alarm service licensing are sold separately.

Specifications

Sensor type: Wireless ceiling motion sensor, dual-technology
Sensor technology: PIR + X-band microwave radar
Field of view: 360°
Detection range: 29.5ft / 9m
Wireless communication: VLink sub-GHz transceiver, internal antenna (863–928MHz)
Wireless range: ≥ 2,000ft (600m) open-field line of sight to a VLink hub
Compatibility: BP32, BP42, BP52, BK22, BE32, WH32, WH52
Power supply: 2x non-rechargeable lithium L91 AA batteries (included)
Battery life: 5-year typical
Tamper detection: Yes — breakaway tab
Dimensions: 4.61 in (11.71 cm) diameter, 1.28 in (3.25 cm) height
Weight: 5.36oz / 152g
Operating temperature: 32°F–122°F / 0°C–50°C, 0–90% RH non-condensing
Certifications: FCC, IC
Warranty: 10 years