CO2 safety alarm

ideal for CO2 gas cylinder storage areas


  • The ESRAD-102 CO2 Alarm is the product that is required by workplaces where CO2 gas cylinders are stored in confined spaces such as storage areas, basements, cool rooms or laboratories.
  • Ideal for cellars, basements, enclosed areas in pubs, clubs and restaurants
  • Comply with workplace safety standards AS5034-2005
  • Audible and Visual Alarms

The CO2 Storage Safety Alarm is designed to protect you and your staff near stored carbon dioxide (CO2). There is also an option to monitor safe levels of oxygen (ESRAD-200 model).

Comply with workplace safety standard AS5034-2005 that requires workplaces to install a CO2 and/or O2 safety alarm where CO2 gas cylinders, or N2 gas cylinders, are stored in an enclosed environment.

CO2 alarms are critical in laboratories, cool rooms, wastewater treatment facilities, breweries, wineries, beverage dispensing areas, restaurants, fast food establishments, dry ice storage, storage tanks, or anywhere CO2 is stored or produced in high volume. O2 levels are critical in laboratories and hospitals.

The Monitor has both audible and visual alarms. 2 built-in relays can trigger the alarms at different user-defined CO2 levels, as well as control a ventilation fan or an HVAC control switch to notify maintenance staff of high CO2 levels. This meets the OSHA PEL (Personal Exposure Limit) Standard of 5,000ppm TWA (time weighted average) in a typical 8-hour workday.

The CO2 Storage Safety Alarm is easy to install and use. Simply mount both units on the wall (all cables and hardware included), plug the display unit into a standard wall jack, and the alarms are ready to protect you, your family and your employees.

  • ESRAD-102: Remote CO2 Storage Safety with Dual Alarm
  • ESRAD-102SX2: Remote CO2 Storage Safety with Dual Alarm and Strobe Light Warning System
  • ESRAD-200: Remote CO2 + O2 Storage Safety with Dual Alarm
  • Sensor connects with Remote Display Unit using 8m RJ45 cable (included)
  • Large digital LCD display clearly indicates the current CO2 level and temperature
  • Model ESRAD-102SX2 only: (2) 100 cd strobe lights w 2m cables for additional visual notification of alarm
  • Model ESRAD-200 only: simultaneous measurements of carbon dioxide and oxygen
  • 2 relays to control ventilation fan(s) or provide remote monitoring
  • Built-in 80dB audible and visual alarm indications
  • IP65 Case may be washed down – a special filter provides protection in this environment


feature specification
Measurement Principle NDIR (Non-Dispersive Infra-Red)
Measurement Range 0-5% (50,000ppm)
CO2 Alarm Set Points Relay 1: 1.5%. Relay 2: 3% CO2 (configurable)
Alarm Audible @ 80 dB | Visual with LED lights
Operating Temperature 0 to 50 °C
Calibration Check every 6 months | Fresh air calibration
CO2 Sensor Lifetime approx. 15 years
Power Supply 110-240 VAC to 6 VDC Adapter
Power Consumption 3 Watts
Relays Peak Current < 2A @ 30VDC or 250VAC, SPDT
Warranty 1 year

manual & docs

related products



more details