Vaisala Background Luminance Sensor LM21

  • Intelligent, stand-alone sensor
  • Easy to integrate with Vaisala LT31, FS11, MITRAS and FD12 sensors
  • Extensive self-diagnostics
  • Window contamination measurement and compensation
  • Optical path blockage detection
  • High power heaters to prevent snow accumulation
  • Calibration traceable to measurement standards
  • Field calibration device available
 

Performance

 

Measurement range
Measurement accuracy

2 ... 40 000 cd/m2
10%

Operating environment

 

Temperature
Humidity

-40...+65 °C
0...100 %RH

Inputs and outputs

 

Operating voltage
Power consumption
Outputs

10…38 VDC or 8…28 VAC
6W, 50W with defrosting heaters
RS232, RS485, frequency output

Mechanics

 

Dimensions
Weight

154 (h) x 100 (w) x 142 (l)  mm
1.1 kg

For complete specifications, please see the brochure or user guide in "Product Documentation".

 

 

Typical delivery times

 

USA

EUROPE

JAPAN, CHINA, ASIA

  1 - 5 products

  2 weeks

  2 weeks

  2 weeks

  1 - 15 products

  4 weeks

  4 weeks

  4 weeks

 

Spare parts

 

Common spare and wearing parts are available. For availability contact sales.

Repair

 

Repair services are available at Vaisala service centers for a fixed price.

Repair price includes:
-repair work
-required parts
-service report

Technical support

 

Technical support for your installed units, contact helpdesk@vaisala.com.

LM21 Background Luminance Sensor