GE Panametrics MIS Series Probe

GE aluminum oxide moisture probes have set the standard of performance and value in industrial moisture measurement for more than 40 years.

In use, M Series moisture probes are coupled to GE hygrometer consoles by an interconnecting cable. Ease of use, wide measurement range and rigorous calibration standards make these systems the preferred choice for industrial moisture measurement worldwide.

Built-In Pressure and Temperature Measurement

Accurate determination of many moisture measurement parameters requires knowledge of the process temperature and pressure. The inconvenience and limitations associated with installing and using separate temperature and pressure sensors have been eliminated, with both capabilities being built directly into the Moisture Image Series probe. A nonlinear NTC thermistor to measure temperature from -30 to 70°C (-22 to 158°F) and a choice of five solid-state piezoresistive transducers, to measure pressures up to 5,000 psig (345 bar), are available.

Temperature and pressure input data are used by Moisture Image Series 1 and 2 analyzers to determine parameters such as ppm and relative humidity.

MIS Electronics Module

The real power of the MIS probe comes from an electronics module that attaches to the moisture sensor probe. The built-in microprocessor provides 16-bit resolution, a real performance enhancement, allowing it to detect parts per billion (ppb) changes in moisture concentration. In addition, it continuously monitors and compensates the electronics to assure long-term stability.

For convenience, moisture probe calibration data is stored in nonvolatile EEPROM, so data entry is automatic and safe from power outage.

The Moisture Image Series probe is intrinsically safe, saving the expense and installation problems associated with explosion-proof housings, purges, or external zener barriers. It is designed and certified to meet the requirements of IEC/CENELEC zone 0 areas.

Ultralow Range Ppb_v Scale

The ppb_v low range fo the Moisture Image Series 1 and 2 analyzers is made possible by employing three separate but equally important technologies. First, the sophisticated new microprocessor-based Moisture Image Series probe has 16-bit resolution, allowing it to detect very small changes in sensor impedance and thus moisture level.

When combined with VCR compatible fittings, this sensor provides superior performance in ultra-high purity systems.

Rigorous Calibration Standards Traceable to the NIST

The aluminum oxide sensor of each MIS probe is individually calibrated in one fo the world's most advanced moisture calibration facilities. Developed over several decades, this facility generates precisely known moisture concentrations, traceable to the National Institure of Standards and Technology (NIST), to which each sensor is exposed during the calibration process.

All data is gathered and stored by a dedicated computer system. Calibrations are repeated over a period of many months to ensure the stability of each individual moisure probe. Only those probes which meet GE Infrastructure Sensing's demanding specifications for accuracy and stability are shipped to customers.

Installation Flexibility

The Moisture Image Series probe is designed to be located at the process, exactly where the measurement is needed. The sensor can withstand process temperatures of -110 to 70°C (166 to 158°F) and pressures from vacuum up to 5,000 psig (345 bar). No minimum flow rate is required. For additional flexibility, the probe can be located up to 3,000 feet (0.9 km) from the analyzer, connected by inexpensive, unshielded, twisted-pair cable (AWG 22). As a result, the probe can be placed in the ideal location, even in a large plant, without the cost, delays and installation problems associated with special cabling.