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Monnit WIT™ Wireless Light Sensor   Buy Wireless Light Sensors!

Wireless Light Sensor

The wireless light sensor detects the presence of light and returns a value of light or no-light to the system. This sensor can be used to alert when lights are left on or can be used to determine if cargo has been opened. Alerts can be set to notify the user via SMS text or email if the sensor detects light with the ability to only notify within time of day parameters.
Monnit WIT Wireless Sensor Specifications
  • 900, 868 and 433MHz operating frequencies
  • 250 - 300 ft. non-line-of-sight device range*
  • Replaceable 3.0V battery
  • At 1 hour heartbeat setting, coin
    cell battery will last ~ 1-2 Years. **
     
  • Sense the pressence of light.
  • know if the lights have been left on at your facility.
  • Know when lightbulbs have blown and need to be replaced.

* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting
    frequency and other variables.

Phototransistor Specifications
Collector Emitter Breakdown Voltage (0.1 mA) 6 V
Collector Dark Current (5 VCE) 3 nA typ.
Collector Emitter Capacitance (Vce=0, f=1MHz, E=0) 16 pF
Collector Light Current (5 VCE, 20 lx) 5 to 24µA 
Collector Light Current (5 VCE,100 lx) 75µA
Angle of Half Sensitivity ±50 degrees
Wavelength of Peak Sensitivity 570 nm
Range of Spectral Bandwidth 440 to 800 nm
Collector Emitter Saturation Voltage (20 lx, 1.2 µA) 0.1 V
RoHS Compliant
 
Absolute Maximum Ratings (Ta = 25 C)
Collector Emitter Voltage 6 V
Emitter Collector Voltage 1.5 V
Collector Current 20 mA
Power Dissipation 100 mW (Tamb≤55°C)
Junction Temperature 100 °C
Operating Temperature Range [-40°C to +85°C]
Storage Temperature Range [-40°C to +100°C]
Soldering Temperature 260°C (t≤5 s, 2 mm distance to package
Thermal Resistance Junction/Ambient 230 K/W (J-STD-051,soldered on PCB)

Need Longer Battery Life?
Monnit WIT2 Sensors provide the same features and benefits of our standard sensors but with the added value of AA batteries. The AA battery option is more robust at a wider temperature range and provides extremely long life for quicker heartbeats.
  • 2 replaceable AA 1.5V batteries.
  • At 1 hour heartbeat setting, included AA batteries will last more than 4 Years. **
  • Robust sensor housing.
WIT2 Sensor Specifications

** Battery life is determined by sensor reporting
    frequency and other variables.
WIT2 Wireless Light Sensor