Ajax Outdoor Detectors: UK Perimeter Protection Installer Guide

Published 9 July 2026 · Last updated 9 July 2026 · Netview CCTV, Leicester

Ajax outdoor detectors let you catch an intruder at the fence line, not the landing window. This guide walks UK installers through the full Ajax Jeweller outdoor range — MotionProtect Outdoor, DualCurtain Outdoor, Curtain Outdoor and the MotionCam Outdoor photo-verification family — with the real specifications, the hub requirements and the siting rules that stop false alarms. Every model here is stocked in Leicester for same-day dispatch from netviewcctv.co.uk.

Ajax outdoor detectors perimeter protection installer guide — The Ajax Jeweller outdoor detector range: volumetric, curtain and photo-verification options.

At a glance

Six in-stock Ajax outdoor detectors cover volumetric, curtain-line and photo-verification perimeter jobs.
MotionProtect Outdoor gives adjustable 3–15 m volumetric cover with anti-masking and pet immunity to 80 cm.
DualCurtain Outdoor throws a bidirectional curtain up to 30 m along a boundary; Curtain Outdoor covers a single 12 m line.
MotionCam Outdoor (PhOD) adds alarm photos over the Wings radio protocol; the HighMount version mounts at 2–4 m.
All run on a Hub 2, Hub 2 (4G) or Hub 2 Plus — photo models need a hub with Wings support.

Why fit outdoor detection first?

Outdoor detection turns an alarm from a break-in recorder into a break-in preventer, because the system triggers while the intruder is still in the garden or yard. Indoor PIRs only fire once entry has already happened; by then the door or window is damaged and the response clock starts late. A perimeter layer of Ajax outdoor detectors gives monitoring stations and keyholders those extra minutes, and pairs naturally with a deterrent such as the Ajax StreetSiren range we covered in our sirens guide. For commercial yards, farm sites and homes with long driveways, it is the single biggest upgrade you can quote in 2026.

The Ajax outdoor detector range at a glance

Ajax currently offers UK installers three detection styles outdoors: volumetric motion, narrow curtain lines, and motion with photo verification. All six models below are wireless Jeweller devices with anti-masking and are in stock at Netview.

Model	Type	Range	Best for
Ajax MotionProtect Outdoor (38197)	Volumetric PIR	3–15 m, 90°	Gardens, yards, driveways
Ajax DualCurtain Outdoor (26097)	Bidirectional curtain	Up to 30 m (15 m per side)	Fence lines, building runs
Ajax Curtain Outdoor (101441)	Single curtain, PIR + microwave	Up to 12 m, 8°	Windows, doorways, gates
Ajax MotionCam Outdoor (38192)	PIR + photo by alarm	Up to 15 m	Visual alarm verification
Ajax MotionCam Outdoor PhOD (39293)	PIR + photo on demand	Up to 15 m	ARC-monitored sites
Ajax MotionCam Outdoor HighMount PhOD (99164)	PIR + microwave + photo	Up to 15 m, mount 2–4 m	High mounting, commercial

Ajax outdoor detector comparison volumetric curtain photo verification — Three ways to cover a boundary: volumetric, curtain line and photo-verified detection.

Ajax MotionProtect Outdoor: the volumetric all-rounder

The Ajax MotionProtect Outdoor is the default choice when you need to blanket an open outdoor area rather than draw a line across it. Two PIR sensors with correlated signal analysis give an adjustable detection distance of 3–15 m across a 90° horizontal angle, and the detector ignores pets up to 80 cm tall when installed at the recommended height (source: ajax.systems — MotionProtect Outdoor). The IP55 enclosure operates from −25 °C to +60 °C, the pre-installed batteries last up to 5 years, and Jeweller radio reaches up to 1,700 m to the hub in open space. Anti-masking detects lens obstruction at up to 20 cm and paint or tape over the optics, per the official user manual. On exposed elevations, add the 38216 rain and sun hood to keep droplets and glare off the lenses.

Ajax DualCurtain Outdoor and Curtain Outdoor: invisible trip lines

Curtain detectors are the right tool when you want to guard a boundary or opening without covering the whole area beyond it. The Ajax DualCurtain Outdoor faces two narrow-angle optical systems in opposite directions, protecting up to 30 m in total — 15 m each side, with each side’s distance adjusted independently so bushes and paths drop out of the zone (source: ajax.systems — DualCurtain Outdoor). Its ELSA three-stage signal analysis filters the false-alarm triggers that plague cheap outdoor PIRs. Mounted on a wall or fence run, one device replaces a pair of single-direction detectors.

The newer Ajax Curtain Outdoor draws a single 12 m curtain with a tight 8° horizontal angle, and backs its two PIR sensors with a K-band microwave sensor to reject thermal interference before an alarm is raised (source: ajax.systems — Curtain Outdoor Jeweller). Fit it above sliding doors, ground-floor windows or gate openings where you need a precise line that a volumetric detector would overshoot. Battery life is up to 3 years on the pre-installed cells.

Ajax MotionCam Outdoor: photo verification at the boundary

The MotionCam Outdoor family answers the question every monitored-site customer asks: “what actually triggered it?” The Ajax MotionCam Outdoor detects motion at up to 15 m and its built-in camera shoots an animated series with each alarm — up to five 320×176 frames, or up to three at 640×352 — delivered to the Ajax apps over the dedicated Wings radio protocol (source: ajax.systems — MotionCam Outdoor PhOD). The PhOD version adds Photo on Demand and Photo by Scenario, so an ARC operator or the customer can poll a live frame without waiting for an alarm — we covered how photo verification cuts false-dispatch costs in our MotionCam photo verification guide.

For commercial sites where detectors must sit out of reach, the Ajax MotionCam Outdoor HighMount PhOD is designed for installation at 2–4 m height and combines two PIR sensors with a K-band microwave sensor plus anti-masking, keeping up to 3 years of battery life at the same 15 m detection range (source: ajax.systems — MotionCam Outdoor HighMount). High mounting keeps the device above tamper reach and clear of forklifts, stock and passers-by.

Which Ajax hub runs outdoor detectors?

Every detector in this guide needs a current Ajax hub, and the photo models specifically need one with the Wings protocol — in practice that means a Hub 2 generation panel. The Ajax Hub 2 Plus (35290) is the safe default for perimeter jobs: Ethernet, Wi-Fi and 2G/3G/LTE signalling paths, and headroom for large device counts on bigger sites. The Hub 2 (4G) suits smaller installs that still want photo verification with mobile backup. If you are unsure which panel fits the job, our Hub 2 vs Hub 2 Plus comparison breaks down device limits, signalling channels and photo throughput side by side. Browse the complete panel and detector range on our Ajax range page.

Siting, anti-masking and pet immunity: getting installs right

Most outdoor false alarms are siting problems, not hardware problems. Follow these rules on every perimeter job:

Height matters. Fit MotionProtect Outdoor and MotionCam Outdoor at the manufacturer-recommended mounting height and keep them level — pet immunity to 80 cm only holds when the geometry is right.
Keep vegetation out of zones. Bushes and shrubs moving in wind are the classic trigger; use the adjustable detection distance to pull the zone short of planting, or choose a curtain model that never looks at it.
Respect the curtain line. DualCurtain Outdoor and Curtain Outdoor want a clear, straight run — avoid parked vehicles or bins that will sit inside the corridor.
Test anti-masking on handover. Cover a lens during commissioning and show the customer the masking alert arriving in the Ajax app — it proves the perimeter cannot be quietly defeated.
Weather-shield exposed units. Driving rain and low sun cause infrared noise; the hood accessory on MotionProtect Outdoor removes both for a few pounds.

Ajax outdoor detector selection workflow for installers — Four decisions take you from site walk-round to a complete Ajax perimeter spec.

FAQ: Ajax outdoor detectors

Do Ajax outdoor detectors work without an outdoor siren?
Yes — detection and app alerts work with any siren setup, but pairing the perimeter with a StreetSiren gives an audible deterrent at the boundary where it has most effect.

How far can outdoor detectors sit from the hub?
Jeweller radio reaches up to 1,700 m in open space; walls and metal cladding reduce that. Run a signal strength test in the Ajax PRO app at the exact mounting point before drilling.

Will MotionCam Outdoor photos work on any hub?
No. Photo transmission uses the Wings protocol, so MotionCam models require a Hub 2, Hub 2 (4G) or Hub 2 Plus — original Hub and Hub Plus panels cannot receive photos.

Are these detectors suitable for insurance-graded UK installs?
Ajax intruder devices are certified to EN 50131 Grade 2, which covers the large majority of UK domestic and small-commercial risk assessments. Check the grade requirement on the specific policy before quoting.

What is the difference between MotionCam Outdoor and MotionCam Outdoor PhOD?
Both photograph on alarm. The PhOD version additionally supports Photo on Demand and Photo by Scenario, letting users and monitoring stations request frames at any time — worth the small premium on monitored sites.

Can I mix curtain and volumetric detectors on one site?
Yes, and you usually should: curtains guard the approach lines and openings while a volumetric unit covers the open area behind them. All coexist on one hub.

Order Ajax outdoor detectors from Netview

Netview holds the full Ajax outdoor detector range in stock in Leicester — MotionProtect Outdoor, DualCurtain Outdoor, Curtain Outdoor and all three MotionCam Outdoor variants — alongside hubs, keypads and sirens, with same-day dispatch on orders placed through netviewcctv.co.uk. Trade customers can order online or collect from our Leicester trade counter.

July 9, 2026 | View: 13 | By: netviewcctv.co.uk