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Model 2050/2060
Ammonia and Halocarbon Gas Monitors
Sierra Monitor Corporation 1991 Tarob Court Milpitas, CA 95035 (408) 262-6611 (800) 727-4377 FAX: (408) 262-9042
Cost effective gas alarm monitors for
ammonia and halocarbon gases. Avail-
able as single channel monitors or part of
multipoint alarm system
The Model 2050 Ammonia and Model 2060 Refrigerant/
Halocarbon Gas Monitors are continuous duty, low cost
stationary monitors for detection of high levels (50-500 PPM)
of ammonia and halocarbon refrigerant gases. These moni-
tors are primarily used in and around freezers, refrigera-
tors, and compressor rooms to warn of leaks and danger-
ous levels of these gases.
An alarm is activated when the concentration of gas ex-
ceeds the user-adjustable level. An alarm condition acti-
vates the alarm light on the front of the monitor and gener-
ates an output signal. An output signal can activate a
remote alarm through the Model 2102 Alarm Panel. The
Model 2102 Dual Channel can be connected up to 500
feet from the monitors. Each monitor also has a 0.5 amp,
dry contact relay replaces the output signal.
The monitors are housed in a polystyrene enclosure that
is suitable for installation in freezer, refrigerator or other
applications. Test connections and adjustment controls
are located on the outside of the enclosure and are easily
used, even when the operator is wearing hand protection.
Alarms
These monitors have two indicator lights on the front of the
unit, a green “safe” indicator and a red “alarm” indicator.
Three alarm conditions are possible. These can be de-
tected visually at both the monitor and controller at all times.
Warm-up - Interrupted (On/Off) “red/green” visual in-
dication when power is first connected to the monitor,
followed by a red light until warm-up is completed and
the green light comes on.
Gas Alarm - Sustained solid red light indicating the
presence of gas at, or above, the pre-set threshold.
Sensor failure - Interrupted (on/off) “red/green” vi-
sual indication after unit has been in operation, indi-
cating either a failed sensor or that the monitor is not
correctly calibrated.
The Model 2050 Ammonia monitor has a factory alarm
setpoint of 100 ppm NH
3
. This setpoint is user adjustable
in the field over a range of 50 to 500 ppm NH
3
. The Model
2050 calibration can be checked with Hydrogen gas.
The Model 2060 Halocarbon monitor can be calibrated with
methane and the factory setpoint varies for the specific
type of halocarbon present. The factory setpoint for R12
is 500 ppm while the setpoint for R134a is 50 ppm. See
the specifications for more details.
Temperature Range
The Model 2050 and 2060 have temperature compensated
circuitry to provide stabilization in temperatures ranging
from -4
o
to 158
o
F.
Semiconductor-Type Sensor
A solid-state semiconductor-type sensor and associated
electronic circuitry ensure trouble-free, long-term opera-
tion. There are no pumps, filters, or chemical cells to
replace or maintain. Except periodic calibration to verify
the alarm setting, no periodic maintenance is required af-
ter installation. The user may adjust the alarm level by
using a different calibration gas concentration.