Technical Specifications
- Product Model: MMS35-621-1-00 (Panametrics Moisture Monitor Series 35)
- Brand: GE (Panametrics)
- Warranty: One Year
- Input Voltage: 120 VAC, 50/60 Hz
- Operating Temperature: -20°C ~ +55°C
- Storage Temperature: -40°C ~ +70°C
- Response Time: Fast dew point measurement response; typical stabilization <60 seconds
- Protection Class: IP40 front panel, panel mount enclosure
- Accuracy Class: ±2°C dew/frost point within primary measuring range
- Output Frequency: N/A
- Rated Power Consumption: Max 12 W
- Communication Interface: Isolated 4–20 mA analogue output, relay alarm contacts
- Supported Protocols: Analogue 4–20 mA signal standard
- Overload Capacity: Internal surge protection, watchdog fault monitoring circuit
- Dimensions (W×H×D): Standard 1/4 DIN panel mounting form factor
Product Overview
The GE MMS35-621-1-00 is a single-channel industrial gas moisture analyser from the Panametrics MMS35 Moisture Monitor platform. This panel-mounted hygrometer works in conjunction with M-series aluminium oxide moisture probes to continuously measure trace moisture content within process gases, delivering dew/frost point and ppmv moisture readings. Process and gas engineers, maintenance teams operating GE Panametrics analytical equipment rely on this unit to detect unwanted water vapour contamination that can damage pipelines, catalysts and process machinery. The analyser features local LCD readout, configurable alarm relays and analogue transmission to DCS/PLC, serving as critical monitoring hardware for gas production, transmission and industrial purification processes. (Word count: 171)
Key Functions
- Trace Moisture Continuous Measurement: Matched with Panametrics M-series probe, the unit accurately detects low-level water vapour in gaseous media. Readings can be displayed as dew point, frost point or ppm volume concentration for process standardisation.
- Isolated 4–20 mA Analogue Transmission: Converts moisture measurement values into standard industrial analogue signals for remote monitoring by SCADA and distributed control systems, supporting long cable runs with minimal signal interference.
- Dual Configurable Alarm Relay Outputs: Two independent alarm thresholds allow users to set warning and critical fault levels. Relay contacts can trigger local annunciators or initiate automatic process interlocks to protect downstream assets.
- Local Operator Interface & Diagnostics: Backlit alphanumeric LCD and front-panel keypad enable on-site parameter configuration, calibration setup and real-time trend viewing. Built-in watchdog circuitry flags probe faults or internal hardware failures for rapid troubleshooting.
Application Scenarios
- Natural Gas Transmission & Processing Plants: The GE moisture monitor supervises pipeline gas dew point to avoid hydrate formation inside pipelines and compressors, ensuring compliance with gas quality specifications.
- Compressed Air & Instrument Air Systems: Installed on dryers to monitor residual moisture, preventing corrosion of control valves, actuators and sensitive analytical instrumentation.
- Petrochemical & Refinery Process Units: Monitors moisture levels in hydrogen, nitrogen and hydrocarbon feed gas streams to protect catalysts and avoid unwanted side chemical reactions.
- Legacy Analytical System Spare Replacement: Direct drop-in replacement for older MMS35 series moisture monitors. Standard 1/4 DIN cutout eliminates cabinet modification work during plant maintenance shutdowns.
