
Monitors
• No costly calibrations required
• Single-zone gas leak refrigerant monitor
• Measurement range of 0-10,000 ppm
• Sensitivity to 1 ppm
• Provides continuous, unattended monitoring
• Capable of detecting and measuring any CFC, HFC or HCFC
• Can monitor a location up to 500 feet from display unit
• Other models are available that detect and monitor gases such
as low range and high range CO
2
, and Nitrous Oxide (N
2
O)
Single-Zone Gas Leak Monitor (HGM-SZ / AGM-SZ)
The HGM-SZ (Halogen Gas Monitor Single-Zone) is designed for continuous single-point
monitoring of Ammonia, CFC, HFC, HCFC and Halon refrigerant gases. The HGM-SZ displays
the type of gas being monitored, along with displaying both the current gas level and the peak
gas level detected on its front panel LCD. The instrument retains a log of previous readings that
can be easily accessed for analysis.
An internal audible alarm and front panel indicators are provided to signal alarm and fault
conditions, and relay contacts can be used to trigger external alarm devices in the event
of a system fault, or if a leak (small), spill (medium), or evacuation (large) level of gas is
detected. The system also includes a 4-20 mA current loop interface that can be connected to
remote monitoring equipment. Bacharach’s gas leak monitor family of products are compliant
with ASHRAE standards, 15-9994 and 15-2004, and meets California Code Regulations for
Refrigerant Monitors.
SENSING TECHNOLOGY
Detector Single Pass, Non-dispersive Infrared (NDIR)
GASES DETECTED
HGM - SZ R-11, R-12, R21, R-22, R-23, R-113, R-114, R-123
R-124, R125, R-134a,R-227, R236FA, R245Fa,
R-401a, R-402a, R-402b, R-404a, R-407a, R407c,
R-408a, R409a, R-410a, R422a, R422d, R424A,
R426A, R427a, R-500, R-502, R-503, R-507,
R508b, HFP, H-1211, H-1301, H-2402, N-1230,
FA188, FC72, HFO-1234YF
AGM-SZ Ammonia (NH3) - also known as R-717
MEASUREMENT RANGE / RESOLUTION
All Refrigerants 0 -10,000 ppm in 1 ppm increments
Ammonia 25 -10,000 ppm in 1 ppm increments
OUTPUTS
Alarm Relays 3 ea. SPDT, 5 Amp, 240 VAC rated
System Fault Relay 1 ea. SPDT, 5 Amp, 240 VAC rated
Digital Display Output 1 dedicated 4-20 mA analog output
(floating ground)
FRONT PANEL DISPLAY
3 Indicator Lights Green = Monitor is powered on. LED glows during
normal operation; flashes when unit is in
warm-up mode
Red = Alarm. LED flashes when any point has
exceeded the alarm setting
Yellow = Fault. LED flashes when there is a
system fault
COMMUNICATIONS
4-20 mA Analog Output
OTHER SPECIFICATIONS
Power 100 to 240 VAC, 50/60 Hz
Dimensions 7.5”H x 13.5”W x 3.625”D (190.5 x 343 x 92 mm)
Weight 5.5 lbs (2.5 kg.)
Maximum Monitoring
Distance Up to 500 feet from measuring point to monitor
Warranty 2 Years
CERTIFICATIONS
UL 61010-1, CSA 22.2 No. 61010-1
EN14624 & CE Mark
ORDERING INFORMATION
3015-4200 HGMSZ single-zone monitor (includes 1 termination
filter, 50 ft. of 304-2742 sample line tubing and 50 ft.of
304-2743 exhaust /purge line tubing)
3015-4280 AGMSZ single-zone monitor (includes 1 termination filter,
50 ft.of 304-2742 sample line tubing and 50 ft.of 304-2743
exhaust /purge line tubing)
3015-5529 Single-Zone Annual Maintenance Kit
3015-4992 MZ-RD Remote Display
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