Collingwood Salvus Bolt-On PIR Sensor

A Sensor That Bolts Straight Onto the Fitting

The Collingwood Salvus Bolt-On PIR Sensor turns an ordinary luminaire into an automatic one without adding a single extra cable. It screws into the standard M20 entry on the fitting, so there is no separate sensor to find a home for on the wall and no second circuit to chase in. Collingwood quotes a four minute conversion time, which is the number that counts when there is a whole run of battens to get through in one visit. It draws 0.5W and switches the light cleanly on and off.

White Polycarbonate, Shaped to Sit on the Luminaire

The body is white polycarbonate, slim and slightly angled, with a faceted lens dome set into the raised neck at one end so the sensor looks down and out into the space rather than along the ceiling. At the opposite end a hex collar and a threaded male spigot do the actual work of fixing, mating with the M20 gland entry on the host fitting. Two small rotary dials sit on the flat face, marked LUX and TIME. Against a white batten or a white anti corrosive housing the whole thing reads as part of the luminaire rather than something bolted to it.

How It Works

A passive infrared sensor watches for changes in heat as someone moves through its field of view, and holds the connected light on while it keeps seeing movement. The TIME dial sets how long the light stays lit after the space empties. The LUX dial sets the daylight threshold, so the sensor can be told to leave the light off when there is already enough natural light coming in. Both are adjusted with a small screwdriver on the face of the unit, which means settings can be tuned once the fitting is up and the space is in real use.

What you fit is the bolt on head itself. It goes into the M20 interface used across Collingwood's Borealis, Caiman Anti-Corrosive and Lentus ranges and is wired inside the luminaire. This is the on/off version, so it switches rather than dims. Collingwood's dimming alternative is the PIRBOLTDIM, which additionally needs the luminaire to have a 0-10V driver.

Where It Works Best

Collingwood specifies this sensor for mounting heights of 2.5 to 6.0 metres, which puts it squarely in warehouse aisles, workshops, plant rooms, loading bays, stock rooms, corridors and covered parking. Anywhere lights get left burning in an empty space is where it pays for itself. The IP65 rating opens up the damp and dusty end of that list too, so wash down areas, unheated stores and vehicle bays are all fair game alongside a clean office corridor.

Because it is IP65 rated it can also be used in a bathroom, provided the fitting it is mounted on is placed correctly for the zone it sits in. Our guide to bathroom lighting zones explains how those zones work.

It is equally at home on a refit. If a building already has compatible Collingwood luminaires in place, adding occupancy control becomes a job of minutes per fitting rather than a rewire.

About Collingwood Lighting

Collingwood designs and manufactures its LED products in Sywell, Northamptonshire, and has worked in LED technology since 2002. The brand states it was among the first to bring fire rated, fully sealed for life and mains dimmable LED products to the UK electrical wholesale market. It has been awarded an EcoVadis Gold medal, which places it in the top 5% of the companies assessed worldwide for sustainability.

Good to Know

• Backed by a 5 year warranty.
• Rated IP65, meaning the housing is fully dust tight and protected against low pressure water jets from any direction.
• Power consumption is 0.5W.
• Fits the standard M20 interface. Collingwood lists the Borealis, Caiman Anti-Corrosive and Lentus ranges as compatible.
• This is the on/off model. It does not dim the connected light, and it does not require a 0-10V driver in the luminaire.
• Specified for mounting heights of 2.5 to 6.0 metres.
• Keep the lens clear. A wipe with a soft damp cloth is enough, and a dusty or cobwebbed lens is the usual reason a PIR starts missing people.
• Moonlight Design recommends installation by a registered NICEIC electrician.

Questions People Ask

What luminaires does the Collingwood Salvus Bolt-On PIR Sensor fit?
The Collingwood Salvus Bolt-On PIR Sensor, product code PIRBOLT, fits the standard M20 interface, and Collingwood lists its Borealis, Caiman Anti-Corrosive and Lentus luminaires as compatible. It is not a standalone sensor and must be fitted to a host luminaire that has an M20 entry.

Does this PIR sensor dim the light or just switch it?
The PIRBOLT switches the connected light fully on and off. It does not dim. Collingwood's dimming equivalent is the PIRBOLTDIM, which requires the luminaire to be fitted with a 0-10V driver, so the two are not interchangeable on the same fitting.

What mounting height is this sensor designed for?
Collingwood specifies the Salvus PIR bolt on sensor for use at mounting heights between 2.5 and 6.0 metres. Fitting it much lower or much higher than that range will affect how reliably it picks up movement across the space below.

Can it be used somewhere damp or dusty?
Yes. The Salvus bolt on PIR sensor carries an IP65 rating, which means the enclosure is sealed against dust ingress and against water projected as a jet from any direction, so it suits wash down areas, workshops and covered outdoor locations.

Can it be set to ignore daylight?
Yes. A rotary dial on the face of the sensor marked LUX sets the ambient light threshold, so the sensor will hold the light off when the space is already bright enough and only respond to movement once daylight drops below the level you set.

• Collingwood Emergency Guide 2025

We offer free standard delivery on orders within the UK Mainland* (an additional fee applies for the Isle of Wight, the Isle of Man, the Scottish Isles, parts of Scotland, Northern Ireland, the Republic of Ireland, the Channel Isles and International).

*Collingwood orders under £150 incur a delivery fee of £9.95 inc. VAT.
*Any order under £49 incurs a delivery fee of £9.95.