Gas Detection and Alarm Systems

Oxygen Indicator and Alarm KS-7O


  • Clean rooms for semiconductor factory
  • Various test rooms for continuous monitoring of oxygen deficiency and the safety under construction.


  • Clear flowing lamp for gas alarm.
  • Automatic backup to operate under electric power failure for more than 2 weeks (350 hrs).
  • Small and lightweight for easy installation.


Model KS-7O
Gas Detected Oxygen
Detection Range 0 to 25.0 vol% or 0 to 50.0 vol%
Concentration Indication LCD 3-digit digital, 0.1vol% resolution (with backlight)
Alam Set Value For 25.0vol%: 1st stage 19.0vol%, 2nd stage: 18.0vol%

For 50.0vol%: 1st stage 18.0vol%, 2nd stage: 25.0vol%

Alarm Indication 1st stage: Orange LED blinks, flowing Orange status lamp
2nd stage: Red LED blinks, flowing Red status lamp
Buzzer: more than 70 dB/m
External Output Gas concentration analog output: 4-20m ADC
Gas alarm contact for 1st and 2nd stage: 1a non-voltage
Latching (standard) or non-latching
Other Functions Maintenance mode, alarm stop
Operating Temperature/humidity -10 to +40 °C / 30 to 85 %RH
Power Source 24 VDC ±10%
Power Consumption Monitoring: 1W, During alarm: 3W
Dimensions W82 x H150 x D35 mm (excluding protrusions)
Weight Approx. 300g
Options Separate Sensor Unit KS-7OF, Battery Unit KS-7xB

Connectable Alarm Units

UV-810(Multi-point)、V3 typeMNV-100M(One-point)

Related Products

Contact Us


Product Category

Product Guide Download

Search by Keywords

Contact Us

Contact Us

For telephone inquiries, please call your nearest New Cosmos Electric office.

List of New Cosmos Electric Locations