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Knightsbridge Recess Mount 5.8GHz HF Motion Sensor - White

£2999
The RRP is the manufacturer's recommended retail price of the item.
30 In Stock - Ready to Ship
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Description

The Knightsbridge OSHFREC is a recess-mount 5.8GHz high-frequency motion sensor designed to automate lighting in corridors, stairwells, storage rooms and other spaces where hands-free control improves convenience and energy efficiency. The sensor sits flush in the ceiling behind a 90mm white polycarbonate bezel, requiring a 62mm diameter cut-out and 35mm recess depth above the ceiling surface.

The 5.8GHz microwave detection technology provides 360° coverage across a 3m diameter zone when installed at a standard 3m ceiling height, detecting motion through non-metallic materials such as plasterboard and lightweight partitions. This makes it suitable for triggering lighting in rooms where occupants may be partially screened from the sensor. The unit supports loads up to 1000W incandescent or 100W LED on 230V mains, with adjustable time delay (30 seconds to 30 minutes), lux threshold (5-1000 lux) and sensitivity range (1-3m).

Four operational modes are selectable via onboard controls: Auto (sensor activates light when motion is detected and ambient light falls below the set lux threshold), Short Pulse (briefly triggers light for confirmation without sustained illumination), Test (15-second intervals for installation verification), and Manual Override (forces light on regardless of motion or ambient light). The IP20 rating limits use to internal dry spaces only. The separate driver module connects to mains via a short fly-lead from the sensor head.

Specification
Diameter 90 mm
Length 132 mm
Height 25 mm
Width 29 mm
Projection 2 mm
Recessed Depth 35 mm
Cut-out Diameter 62 mm
Construction Polycarbonate
Finish White
Class II
IP Rating IP20
Primary Voltage 230V 50Hz
Warranty 2
Downloads

Product Specification Sheet

Product Manual

Frequently Asked

What ceiling depth is required for installation?

The sensor requires a 62mm diameter cut-out and a minimum 35mm recess depth above the ceiling surface to accommodate the driver module and wiring. The sensor face projects just 2mm below the finished ceiling once installed.

What's the difference between HF and PIR sensors?

High-frequency (microwave) sensors like this 5.8GHz unit detect motion through non-metallic materials such as plasterboard, whereas passive infrared (PIR) sensors require direct line-of-sight to the moving object. HF sensors are less prone to false triggers from temperature changes but may detect motion beyond walls in adjacent rooms if not calibrated correctly.

Can the sensitivity and timer be adjusted?

Yes. The onboard controls allow adjustment of detection range (1-3m), time delay before the light switches off (30 seconds to 30 minutes), and lux threshold (5-1000 lux, controlling the ambient light level below which the sensor activates).

Is it suitable for LED lighting?

Yes, the sensor supports LED loads up to 100W or incandescent loads up to 1000W. For larger installations or multiple zones, pair the sensor with a contactor or relay to avoid exceeding the rated load.

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

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    Description

    The Knightsbridge OSHFREC is a recess-mount 5.8GHz high-frequency motion sensor designed to automate lighting in corridors, stairwells, storage rooms and other spaces where hands-free control improves convenience and energy efficiency. The sensor sits flush in the ceiling behind a 90mm white polycarbonate bezel, requiring a 62mm diameter cut-out and 35mm recess depth above the ceiling surface.

    The 5.8GHz microwave detection technology provides 360° coverage across a 3m diameter zone when installed at a standard 3m ceiling height, detecting motion through non-metallic materials such as plasterboard and lightweight partitions. This makes it suitable for triggering lighting in rooms where occupants may be partially screened from the sensor. The unit supports loads up to 1000W incandescent or 100W LED on 230V mains, with adjustable time delay (30 seconds to 30 minutes), lux threshold (5-1000 lux) and sensitivity range (1-3m).

    Four operational modes are selectable via onboard controls: Auto (sensor activates light when motion is detected and ambient light falls below the set lux threshold), Short Pulse (briefly triggers light for confirmation without sustained illumination), Test (15-second intervals for installation verification), and Manual Override (forces light on regardless of motion or ambient light). The IP20 rating limits use to internal dry spaces only. The separate driver module connects to mains via a short fly-lead from the sensor head.

    Specification
    Diameter 90 mm
    Length 132 mm
    Height 25 mm
    Width 29 mm
    Projection 2 mm
    Recessed Depth 35 mm
    Cut-out Diameter 62 mm
    Construction Polycarbonate
    Finish White
    Class II
    IP Rating IP20
    Primary Voltage 230V 50Hz
    Warranty 2
    Downloads

    Product Specification Sheet

    Product Manual

    Frequently Asked

    What ceiling depth is required for installation?

    The sensor requires a 62mm diameter cut-out and a minimum 35mm recess depth above the ceiling surface to accommodate the driver module and wiring. The sensor face projects just 2mm below the finished ceiling once installed.

    What's the difference between HF and PIR sensors?

    High-frequency (microwave) sensors like this 5.8GHz unit detect motion through non-metallic materials such as plasterboard, whereas passive infrared (PIR) sensors require direct line-of-sight to the moving object. HF sensors are less prone to false triggers from temperature changes but may detect motion beyond walls in adjacent rooms if not calibrated correctly.

    Can the sensitivity and timer be adjusted?

    Yes. The onboard controls allow adjustment of detection range (1-3m), time delay before the light switches off (30 seconds to 30 minutes), and lux threshold (5-1000 lux, controlling the ambient light level below which the sensor activates).

    Is it suitable for LED lighting?

    Yes, the sensor supports LED loads up to 100W or incandescent loads up to 1000W. For larger installations or multiple zones, pair the sensor with a contactor or relay to avoid exceeding the rated load.

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.