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White wireless motion sensor and receiver set, wall mount, battery powered

Emerson KS-SF20R Smart Sensor White Wireless 8m Range 36 Ringtones 280m 918ft 32 Sensors

SKU CH-GSXX-TJZDX MPN KS-SF20R

Wireless motion sensor kit with 8 m detection, 280 m range, 36 ringtones and expandable to 32 sensors

  • ColorWhite
  • ProtocolWireless
  • Typeclock
  • Specifications0.79 L x 1.57 W x 2.36 H inches, 0.2 kilograms, 8 meters, Wa
  • Features1* Receiver, 1* Infrared Sensor, Wall Mount, 8 meters, false
  • Dimensions14.33in W x 12.83in H x 9.06in D
  • Five operating modes cover welcome, doorbell, alarm, colour light and lighting needs
  • 36 ringtones plus five welcome languages with four volume levels up to 113 dB
  • Wireless link reaches 280 m or 918 ft between sensor and receiver
  • Infrared sensor detects motion across 2 to 8 m or 7 to 26 ft
  • System expands to 32 sensors and eight remotes per receiver with colour-coded alerts

Motion-sensor doorbell kit

The Emerson KS-SF20R is a wireless motion-sensor doorbell kit designed for indoor use. It includes one receiver and one infrared sensor that detects movement up to 8 meters away. The system operates on AAA alkaline batteries and mounts on a wall. It suits homes, small businesses or care settings that need an audible or visual alert when someone approaches a doorway.

Who it suits and who it does not

The kit works well for shop owners who want a door chime, caregivers monitoring elderly relatives or households with hearing-impaired occupants who benefit from adjustable-volume tones and coloured LED indicators. It is not suited for outdoor installation because the hardware is not waterproof. Buyers who need multiple distinct chimes per sensor should also look elsewhere, as the receiver uses only coloured lights to differentiate up to 32 sensors.

Wireless range and expandability

The receiver communicates with sensors at up to 280 metres (918 feet) in open space, which determines whether the kit covers the required distance between entrance and monitoring point. Each receiver supports a maximum of 32 motion sensors and eight remote controls, so the total number of entry points you plan to monitor decides if one kit is sufficient.

Highlights

  • Five operating modes cover welcome, doorbell, alarm, colour light and lighting needs
  • 36 ringtones plus five welcome languages with four volume levels up to 113 dB
  • Wireless link reaches 280 m or 918 ft between sensor and receiver
  • Infrared sensor detects motion across 2 to 8 m or 7 to 26 ft
  • System expands to 32 sensors and eight remotes per receiver with colour-coded alerts

Specifications

BrandEmerson
ModelKS-SF20R
ColorWhite
ProtocolWireless
Typeclock
Part NumberKS-SF20R
Specifications0.79 L x 1.57 W x 2.36 H inches, 0.2 kilograms, 8 meters, Wall Mount, Battery Powered, AAA alkaline, Motion Sensor, Remote Control, KS-SF20R, M-CA-KS-SF20R-1PK, GREENCYCLE TECH INC., greencycle
Features1* Receiver, 1* Infrared Sensor, Wall Mount, 8 meters, false
Dimensions14.33in W x 12.83in H x 9.06in D
Weight0.2 kilograms
Package Contents1* Receiver, 1* Infrared Sensor

Questions about this item

What are the exact dimensions of the receiver so I can check if it fits my wall space?

The receiver measures 14.33 inches wide by 12.83 inches high by 9.06 inches deep, weighing 0.2 kilograms.

How do I pair the infrared sensor with the receiver, and what is the common mistake to avoid?

Press the learning button on the receiver, then trigger the sensor within range; the common error is mounting the sensor beyond the 8-meter detection zone before pairing is confirmed.

Which batteries will I need to replace later, and how many?

The system runs on AAA alkaline batteries for both the receiver and the infrared sensor; expect to replace two sets over time.

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