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PIR & Motion Sensors

A motion sensor detects a person moving in its coverage area and signals an alarm panel, a wireless hub, a camera system or a lighting controller. This range covers indoor PIR and dual-technology detectors, ceiling and curtain PIRs, outdoor and perimeter detectors, photo-verification detectors with built-in cameras, beams and radar from Ajax, GJD, Optex, Pyronix, Texecom and other makers, plus glass-break, shock and tilt sensors.

Choosing PIR & Motion Sensors

Choose a detector by where it goes, how it connects, and what could cause false alarms there.

PIR, dual-tech or anti-masking

A PIR senses body heat moving across its zones: the Pyronix KX10DP covers 10m with pet immunity and the Texecom GDB-0001 quad-element PIR covers 20m. Dual-technology detectors such as the Pyronix KX10DTP3 and Optex FLX-S-DT add a microwave sensor, and the two must agree. Anti-masking models such as the Pyronix KX15DTAM and Ajax Superior MotionProtect G3 Fibra report an attempt to cover the lens.

Wall, ceiling or curtain

Ceiling detectors see 360° from the middle of a room: the Pyronix OCTOPUSDQ covers 12 m and the Texecom Capture CQ-W 9.3m. Curtain PIRs make a narrow wall of detection, such as the Pyronix KX18DC with an 18 m vertical beam and the Hikvision DS-PDC15-EG2(B) at 15 m and 6.3°.

Wired or wireless

Wired detectors connect to the panel zones. Wireless detectors talk to a matching wireless system, such as Ajax Jeweller, Texecom Ricochet (Capture D20-W, 20m), Pyronix Enforcer (KX15DC-WE), Hikvision AX-Pro on 868 MHz (DS-PDP15P-EG2-WE(B), 15 m) or Dahua two-way radio (DHI-ARD1233-W2(868)). Ajax Fibra detectors are the wired option on an Ajax hub.

Outdoor, perimeter and verification

The GJD ELITE GJD022 covers 10-35 m at IP55 and the GJD320 D-TECT 60 covers 40-60m at IP65. For a boundary, the Takex PB-100FA quad beam spans 100 m and the GJD509 laser curtain 10 m × 10 m. Photo-verification detectors such as the Ajax MotionCam Outdoor PhOD take pictures when triggered, so the alarm can be checked.

TypeExampleCoverage
Dual-tech, Grade 3Pyronix FPTMD15G3-315 m
Ceiling 360°Pyronix OCTOPUSDQ12 m
Photo verificationAjax 36662.121.WH115 m, IP56
External PIRGJD320 D-TECT 6040-60m, IP65
Quad beamTakex PB-200FA200 m, IP55

Grades and standards

EN50131-2-2 Grade 2 detectors include the Pyronix KX10DP and Texecom GDB-0001. Grade 3 models include the Pyronix FPTMD15G3-3 and KX15DTAM and the Texecom AKE-0001 (EN50131-2-4).

Brands we stock in PIR & Motion Sensors

Acre, Ajax, Aritech, Axis Communications, Dahua Technology, DMP, Eaton, GJD, Hikvision, Honeywell Commercial Security, Luminite, Magosys Systems, Optex, Pyronix, Takex, Texecom, Videofied, Visonic, Voltek and Xtralis by Honeywell.

Ajax supplies the most detectors on this page.

Related categories

Connect detectors to burglar and intruder alarms, switch security lighting, or see the wider security and surveillance range, including Ajax and GJD. Installation advice is in our Help & Support guides.

Frequently asked questions

How does a motion detector work?

A motion detector senses movement in its coverage area and signals an alarm panel, hub or controller when it sees an intruder. A passive infrared (PIR) detector reacts to body heat moving across its zones, while microwave and radar detectors measure reflected signals. Dual-technology models combine a PIR with microwave to help cut false alarms. The range here includes PIR, dual-technology, curtain and photo-verification detectors.

What is a long range PIR sensor?

A long range PIR sensor is an outdoor detector that watches a long, narrow zone, such as a driveway, yard or boundary fence. Many let the installer program or mask the range so the beam stops short of a road or neighbour's land, which reduces false alarms. They often trigger CCTV, lighting or an alarm. The range here includes long range external PIRs with zinc-alloy housings.

How do you choose a motion sensor for a home?

Choose a home motion sensor that works with your alarm panel or hub, then match the type to the room. Pet-immune detectors can ignore smaller animals when mounted at the right height and angle. A ceiling detector suits a room where no wall position sees the whole space, and dual-technology models help near heaters or sunny windows. The range here includes pet-immune and ceiling-mount detectors.

Which is better, a wired or wireless motion sensor?

A wired motion sensor suits a new build or refit where cable can be run to the panel, and it needs no batteries. A wireless sensor fits a finished building with less disruption, but it must use the same radio system as the panel or hub, and its batteries need changing. The range here includes wired and wireless detectors.

What is a PIR sensor?

A PIR sensor is a passive infrared detector that reacts to the change when a warm body moves across its field of view. It gives out no signal of its own, so it uses little power. PIR sensors are common in intruder alarms and can switch security lighting or trigger cameras. The range here includes indoor, outdoor and curtain PIR detectors.

  • Established 1975
  • Birmingham trade counter
  • UK-only supply

Written by the West Midlands Electrics technical team

Updated

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