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Surface/Recess Mounting mmWave Occupancy Sensor - Black

£2799
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Description

The Knightsbridge OS0026B is a dual-mount mmWave occupancy sensor that can be installed as either a recessed ceiling fitting or a surface-mounted unit using the included surface box. Using millimetre-wave radar technology operating at a shorter wavelength than traditional microwave sensors, it detects both major movements such as walking and subtle activity including typing or breathing. The 93mm diameter black polycarbonate body houses pre-fitted ceiling springs for recess installation and carries an IP20 rating for dry indoor use.

Designed for commercial offices, residential lighting automation, corridor lighting and washroom control, the sensor provides 360° detection when ceiling-mounted or 180° coverage when wall-mounted. Adjustable settings include detection range (25-100% or 1-25m²), time delay (10 seconds, 1, 5 or 15 minutes), and ambient light sensitivity (below 10Lux, 30Lux, 100Lux or daytime operation). Installation height is specified between 2.2-4m from floor level. Multiple units can be wired in parallel where larger coverage areas are needed.

The rated load supports up to 2000W for incandescent lighting or 1000W for LED installations. The polycarbonate construction operates reliably in temperatures from -20°C to +40°C and humidity up to 93%, making it suitable for unheated storage areas, plant rooms and outdoor-facing entrance halls where temperature fluctuation occurs. The 28mm recessed depth fits standard ceiling voids without requiring additional structural work, while the surface box alternative allows retrofit installation onto existing plasterboard or masonry without cutting.

Specification
Length 93mm
Height 36mm
Width 93mm
Diameter 93mm
Projection 36°
Recessed Depth 28mm
Construction Polycarbonate
Finish Black
Class II
IP Rating IP20
Primary Voltage 230V 50Hz
Downloads

Product Specification Sheet

Frequently Asked

What is the difference between mmWave and standard PIR sensors?

mmWave sensors use millimetre-wave radar to detect motion, including subtle movements like typing or breathing. PIR sensors rely on infrared heat signatures and typically only detect larger movements like walking. mmWave offers higher accuracy and fewer false negatives in office and washroom environments.

Can this be used for bathroom lighting control?

The IP20 rating limits it to dry indoor environments only. It is not suitable for bathroom zones where water ingress might occur. For washrooms, mount the sensor outside the wet zones or use a higher IP-rated alternative.

What installation height works best?

The sensor is rated for installation between 2.2m and 4m from floor level. At 2.4m ceiling height in a typical residential room, the sensor provides optimal coverage. At 3-4m commercial ceiling heights, the adjustable range setting compensates for increased distance.

How is the detection range adjusted?

The sensor includes an adjustment dial to set detection range from 25-100%, equivalent to 1-25m² coverage area. This allows the sensor to be tuned to avoid detecting movement in adjacent rooms or corridors through doorways.

Shipping & Returns

Free worldwide delivery

Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

Returns

30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.

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    Description

    The Knightsbridge OS0026B is a dual-mount mmWave occupancy sensor that can be installed as either a recessed ceiling fitting or a surface-mounted unit using the included surface box. Using millimetre-wave radar technology operating at a shorter wavelength than traditional microwave sensors, it detects both major movements such as walking and subtle activity including typing or breathing. The 93mm diameter black polycarbonate body houses pre-fitted ceiling springs for recess installation and carries an IP20 rating for dry indoor use.

    Designed for commercial offices, residential lighting automation, corridor lighting and washroom control, the sensor provides 360° detection when ceiling-mounted or 180° coverage when wall-mounted. Adjustable settings include detection range (25-100% or 1-25m²), time delay (10 seconds, 1, 5 or 15 minutes), and ambient light sensitivity (below 10Lux, 30Lux, 100Lux or daytime operation). Installation height is specified between 2.2-4m from floor level. Multiple units can be wired in parallel where larger coverage areas are needed.

    The rated load supports up to 2000W for incandescent lighting or 1000W for LED installations. The polycarbonate construction operates reliably in temperatures from -20°C to +40°C and humidity up to 93%, making it suitable for unheated storage areas, plant rooms and outdoor-facing entrance halls where temperature fluctuation occurs. The 28mm recessed depth fits standard ceiling voids without requiring additional structural work, while the surface box alternative allows retrofit installation onto existing plasterboard or masonry without cutting.

    Specification
    Length 93mm
    Height 36mm
    Width 93mm
    Diameter 93mm
    Projection 36°
    Recessed Depth 28mm
    Construction Polycarbonate
    Finish Black
    Class II
    IP Rating IP20
    Primary Voltage 230V 50Hz
    Downloads

    Product Specification Sheet

    Frequently Asked

    What is the difference between mmWave and standard PIR sensors?

    mmWave sensors use millimetre-wave radar to detect motion, including subtle movements like typing or breathing. PIR sensors rely on infrared heat signatures and typically only detect larger movements like walking. mmWave offers higher accuracy and fewer false negatives in office and washroom environments.

    Can this be used for bathroom lighting control?

    The IP20 rating limits it to dry indoor environments only. It is not suitable for bathroom zones where water ingress might occur. For washrooms, mount the sensor outside the wet zones or use a higher IP-rated alternative.

    What installation height works best?

    The sensor is rated for installation between 2.2m and 4m from floor level. At 2.4m ceiling height in a typical residential room, the sensor provides optimal coverage. At 3-4m commercial ceiling heights, the adjustable range setting compensates for increased distance.

    How is the detection range adjusted?

    The sensor includes an adjustment dial to set detection range from 25-100%, equivalent to 1-25m² coverage area. This allows the sensor to be tuned to avoid detecting movement in adjacent rooms or corridors through doorways.

    Shipping & Returns

    Free worldwide delivery

    Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

    Returns

    30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.