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WC20 Wireless Door Window Alarm Magnetic Contact Switch Sensor

Recessed wireless door/window contact transmitter
  • WC-20

  • Sentek

WC20 Series

Recessed wireless door/window contact transmitter WC20-345

The WC20 is the industry’s most flexible supervised recessed door/window contact,allowing a multitude of applications while hiding the transmitter within a door or window frame. The sensor transmits signals to the control panel or receiver when a magnet mounted near the sensor is moved away from or closer to the sensor. The WC20 uses a replaceable lithium battery and should last 6 years under normal usage .


Wireless Signal Range  

450 ft., open air, with 2GIG or Honeywell Wireless Alarm Control Panel

Code Outputs

Alarm; Alarm Restore; Supervisory; Low Battery

Number of zones

345.000 MHz 

319.508 MHz 433.920 MHz

crystal controlled

or other frequency

Transmitter Frequency  

± 15 kHz  

± 10 kHz   ± 15 kHz

Transmitter Frequency Tolerance

24 kHz  

24 kHz   24 kHz  

Modulation Type    

Amplitude Shift Keying—On/Off Keying (ASK-OOK)

Unique ID Codes    

Over one (1) million different code combinations

Supervisory Interval  

70 minutes

Peak Field Strength  

Typical 16,000 uV/m at 3m

Reed Switch Magnetic Sensitivity 

10 to 15 amp turns

Reed Sensitivity  

0.625 in. (1.59 cm) minimum gap, 1 in. (25 cm) typical

Magnet Type  

Rare earth

Magnet Dimensions (LxWxH)  

0.51 x 0.75 in. (1.3 x 1.9 cm)

Sensor Dimensions (LxWxH)  

2.50 x 0.75 in. (6.37 x 1.9 cm)

Housing Material  

ABS plastic


White, Tan or Brown available

Operating Temperature  

32° to 120°F (0° to 49°C)

Relative Humidity 

5-95% Non-Condensing

Battery (included)  

One (1) CR2032

Battery life  

6 year (on normal condition)

Regulatory Listing  

FCC Part 15


Two (2) years(limited)

Included Accessories  

Two magnetic cap styles (Normal and Screw type), two (2) Phillip’s

flat-head screws


1.25 oz. (37 g) (including battery & magnet)

Models available

WC20-H: compatible with Honeywell and 2GIG wireless panel (345MHz)

WC20-2: compatible with 2GIG wireless panel (345MHz)

WC20-G: compatible with GE Interlogix wireless panel (319.508MHz)

WC20-D: compatible with DSC wireless panel (433.92MHz)

Note :Other protocol and frequency available upon special request .

Color available: White, Tan and Brown








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 # 8108 or 8817

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