Gas Detection and Alarm Systems

Carbon Dioxide Detector and Alarm KS-7R


For CO2 management at offices, agricultural industries, and manufacturing industries.


  • For measurement of carbon dioxide concentration of 360-5,000 ppm.
  • Clear flowing LED lights for gas alarm indication.
  • Small and lightweight for easy installation.
  • Clear, easy to read LCD display with back ground light.
  • Build in alarm buzzer 70 dB/m.


Model KS-7R
Gas Detected Carbon Dioxide
Detection Principle NDIR
Sampling Method Diffusion
Detection Range*1 360 to 5,000 ppm
Indication Accuracy
(Under identical conditions)
0 to +40°C : ±5% of full scale
Others : ±10% of full scale
Alarm Set Value AL1 : 2,000ppm
AL2 : 5,000ppm
Display LCD 4-digit digital, 5ppm resolution (with backlight)
Alarm Indication 1st stage: Orange LED blinks, flowing Orange status lamp
2nd stage: Red LED blinks, flowing Red status lamp
Buzzer: more than 70dB/m
External Output Gas concentration analog output: 4-20mA DC
Gas alarm contact for 1st and 2nd stage: 1a non-voltage
Latching (standard) or non-latching
Compliance CE(EMC & RoHS directives)
Operation Temperature/humidity*2 -10 to +50 °C / 0 to 85 %RH
Power Source 24 VDC ±10%
Power Consumption Monitoring: 1W
During alarm: 3W
Dimensions W82 x H150 x D35 mm
Weight Approx. 300g

*1 Do not use the detector in a place where Carbon Dioxide is 360ppm or below.
*2 No rapid temperature/humidity changes. No condensation.




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