Description
⚙️ Product Overview
The BACHARACH HGMSZ 3015-4200 is an HGM-SZ single-zone halogen gas monitor designed for continuous monitoring of halogenated refrigerant gases. It is intended for applications where refrigerant leakage needs to be detected and communicated to local or remote monitoring systems.
The HGM-SZ uses a single-pass Non-Dispersive Infrared (NDIR) detector and can monitor a wide range of CFC, HCFC, HFC and related halogen refrigerants. The 3015-4200 configuration provides a measurement range of 0 to 10,000 ppm with 1 ppm sensitivity.
The unit includes a digital front-panel display, alarm and system-fault relays, and a dedicated 4–20 mA DC analog output for connection to external monitoring or control equipment. The 3015-4200 package also includes a termination filter, 50 ft. sample tubing, and 50 ft. exhaust/purge tubing.
🔧 Key Features
- 🧪 Continuous single-zone halogen refrigerant monitoring
- 🔬 Single-pass NDIR detection technology
- 📊 Measurement range up to 10,000 ppm
- 🎯 1 ppm sensitivity
- 📟 Digital front-panel display
- 🚨 Three SPDT alarm relays
- ⚠️ One SPDT system-fault relay
- 🔌 Dedicated 4–20 mA DC analog output
- 📏 Monitoring distance up to 500 ft. from measuring point to monitor
- 🔧 Includes termination filter and sample/exhaust tubing
- 🏭 Designed for industrial refrigeration and facility monitoring applications
📊 Technical Datasheet
| Parameter | Specification |
|---|---|
| Brand | BACHARACH |
| Model | HGMSZ |
| Part Number | 3015-4200 |
| Series | HGM-SZ |
| Product Name | Single-Zone Halogen Gas Monitor |
| Detector Type | Single-Pass NDIR |
| Measuring Range | 0–10,000 ppm |
| Sensitivity | 1 ppm |
| Output | 4–20 mA DC + Alarm/Fault Relays |
| Power Supply | 100–240 VAC, 50/60 Hz |
🧪 Gas Detection
The HGM-SZ is configured for monitoring halogen refrigerants including a broad range of CFC, HCFC, HFC and related refrigerants. The documented supported-gas list includes refrigerants such as R-22, R-134a, R-404A, R-407C, R-410A, R-507, R-508B and other compatible gases.
The 0–10,000 ppm measurement range provides coverage from low-level refrigerant detection through higher concentration conditions. The specified sensitivity is 1 ppm, while the published accuracy is ±1 ppm ±10% of reading from 0 to 1,000 ppm.
The actual gas selection and calibration requirements should always be matched to the refrigerant being monitored.
📟 Display & Alarm Functions
The front panel provides a digital display for gas-monitoring information and status indication. Three front-panel LEDs identify operating and fault conditions:
- 🟢 Green: Unit operating properly
- 🟡 Yellow: Sample-line blockage or other system fault
- 🔴 Red: A monitored point has exceeded an alarm setting
The monitor provides three SPDT, 3 A, 250 VAC-rated alarm relays and one SPDT, 3 A, 250 VAC-rated system-fault relay. These relay outputs can be integrated with external alarm equipment, control systems, or facility monitoring circuits.
🔌 Analog & System Integration
The dedicated 4–20 mA DC analog output allows the HGM-SZ to communicate gas concentration information to an external monitoring or control system.
This makes the 3015-4200 suitable for integration with:
- Building management systems
- Refrigeration control systems
- Facility alarm systems
- Industrial monitoring panels
- PLC analog-input systems
- Centralized environmental monitoring systems
The analog output uses a floating ground configuration according to the published specification.
📏 Sampling System
The HGM-SZ uses a remote sampling arrangement rather than requiring the monitor to be located directly at the measurement point. The documented maximum distance from the measuring point to the monitor is 152.4 m (500 ft.), depending on installation conditions.
The standard 3015-4200 package includes:
- 1 × termination filter
- 15.24 m / 50 ft. sample-line tubing
- 15.24 m / 50 ft. exhaust/purge-line tubing
Longer sample-line installations require consideration of tubing length and response time. The published response time is approximately 9–90 seconds, depending on sample-tube length.
📐 Mechanical Information
The HGM-SZ enclosure is approximately 13.7 × 7.7 × 3.6 in. or 347.98 × 195.58 × 91.44 mm, with a listed weight of approximately 7 lb. / 3.175 kg.
The unit is designed for installation as a dedicated single-zone gas-monitoring device. Installation location should provide suitable access for tubing, electrical connections, inspection and maintenance.
🛠️ Installation & Maintenance
Before commissioning the BACHARACH HGMSZ 3015-4200:
- Verify the complete part number 3015-4200.
- Confirm that the monitor is configured for the refrigerant being measured.
- Check the 100–240 VAC power connection.
- Inspect the sample tubing for kinks, cracks or contamination.
- Install the supplied termination filter correctly.
- Verify the exhaust/purge tubing connection.
- Check the alarm relay wiring before connecting external equipment.
- Confirm the 4–20 mA signal connection and scaling.
- Allow the monitor to complete its startup sequence.
- Perform a functional gas-monitoring and alarm test before placing the system into service.
Regular maintenance should include inspection of filters, tubing, pump operation, alarm outputs, display status and calibration condition. Bacharach documentation also identifies dedicated replacement filters, pump assemblies, IR bench kits, display boards and annual maintenance kits for the HGM-SZ platform.
🔍 Troubleshooting
No gas reading:
Check the sample line, termination filter, tubing connections and pump operation. A blocked or disconnected sample line can prevent proper gas sampling.
Gas reading is unstable:
Inspect the sample tubing for leaks or contamination and verify that the monitored refrigerant is appropriate for the installed HGM-SZ configuration.
Yellow fault indicator is illuminated:
Check for a clogged sample line or another system fault. Inspect the tubing, filter and sampling system before resetting the monitor.
Alarm relay does not activate:
Verify the programmed alarm condition and inspect the relay wiring and external alarm circuit.
4–20 mA output is incorrect:
Check the analog wiring, polarity, connected monitoring equipment and expected signal scaling.
Slow response:
Check sample-tube length, tubing condition, filter condition and flow through the sampling system. Longer sample tubing naturally increases response time.
Monitor does not power on:
Verify the incoming AC supply, fuse/protection components and power-entry connections before further troubleshooting.
❓ FAQ
Q: What is the exact part number?
A: The exact part number is 3015-4200, identified as the HGM-SZ Halogen Gas Monitor – Single Zone.
Q: What type of gases does it monitor?
A: It is designed for monitoring halogen refrigerant gases, including a broad range of CFC, HCFC, HFC and related refrigerants.
Q: What is the measuring range?
A: The HGM-SZ 3015-4200 has a documented range of 0–10,000 ppm.
Q: What is the sensitivity?
A: The specified sensitivity is 1 ppm.
Q: What detector technology does it use?
A: The HGM-SZ uses a single-pass NDIR detector.
Q: Does it provide a 4–20 mA output?
A: Yes. It provides a dedicated 4–20 mA DC analog output for integration with external monitoring equipment.
Q: How many alarm relays are provided?
A: The unit provides three SPDT alarm relays plus one SPDT system-fault relay.
Q: What power supply is required?
A: The documented specification is 100–240 VAC, 50/60 Hz.
Q: Is the sample tubing included?
A: The standard 3015-4200 package includes 15.24 m (50 ft.) of sample tubing and 15.24 m (50 ft.) of exhaust/purge tubing, together with a termination filter.
📦 Recommended BACHARACH Models & Parts
- BACHARACH HGM-SZ 3015-4200
- BACHARACH AGM-SZ 3015-4280
- BACHARACH 3015-3420 Termination Filter
- BACHARACH 3015-5529 Annual Maintenance Kit
- BACHARACH 3015-5176 Replacement Pump
- BACHARACH 3015-4572 HGM IR Bench Replacement Kit
- BACHARACH 3015-5520 Display Board
- BACHARACH 3015-5523 Universal Power Supply
- BACHARACH 3015-5478 Main PCB Board
- BACHARACH 3015-5512 End-of-Line Water Stop Filter
For replacement planning, verify the complete part number, monitored refrigerant, sampling configuration, power supply and required alarm/analog interfaces before installation.
