Analygas® Systems Model 21 is an economical and durable gas monitor.
It has stood the test of time, having been upgraded and improved during a continuous production span of over 30 years, yet it is still
as popular as ever with end users.
The Model 21 protects people, produce and machinery from excessive concentrations
of gases and vapours.
It is particularly suited to operation in unattended locations such as machine
rooms and parking garages.
Reliable Broad Band Sensors
Visual and Audible Alarms
Optional Digital Display (Front Panel or Remote Mounted)
Easy To Install
Analygas® Systems Model 21 is a wall mounted
gas monitor for use in non-hazardous indoor locations. It has 2 alarm levels and is supplied
with 1 or 2 sensors. Either or both sensors can be configured to activate the alarms. Sensors may be mounted on the unit or in a remote area.
Dry contact relays are included to control
ventilation fans or permit activation of other
A 4-20mA output is standard for the purpose of
data logging, PLC or computer processing.
Solid state sensors
Optional Digital Display
1 or 2 Sensing Points
120V or 240V Input, 10VA
4-20mA or 0-1V Output
2 Output Relays
-40°C to 40°
-40°F to 104°F
A digital display indicating gas concentration
is available for mounting on the front panel or
at a remote site.
To reduce unnecessary fan cycling, the Model 21 is equipped with electronic timers, which delay the action of the alarms and relays.
This helps prevent excessive wear on external control systems.
This favourite of many years is ideal for use in machine rooms, parking garages, loading docks, battery charging areas, furnace rooms, etc.