GE’s Aurora analyzer uses tunable diode laser absorption spectroscopy (TDLAS) to measure moisture in natural gas rapidly and accurately. The analyzer is suitable for installation in hazardous areas and operates over a wide range of environmental conditions. Aurora’s fast response quickly alerts and documents when moisture concentrations are out of compliance. Once process upsets are corrected and the gas dries out, the fast response enables natural gas to be cleared for entry into the “energy grid.”

GE’s experience in moisture measurement includes aluminum oxide, polymer capacitance and chilled mirror sensors. GE’s heritage also includes the development of the first injection diode laser in 1962 by Dr. Robert Hall in Schenectady, NY. The compact and inexpensive diode laser made it possible for compact discs, laser printers and fiber optic telecommunications. The new Aurora TDLAS hygrometer enables natural gas processing and transportation facilities to monitor moisture content in real time with high precision and reliability.

The Moisture Image Series 1 is the multichannel, multifunction top-of-the-line model in the GE moisture series analyzer family. The Moisture Image Series 1 measures moisture, pressure and temperature in non-aqueous liquids and gases. There is also an option for measuring oxygen concentration in gases. In addition, the auxiliary inputs can accept readings from any sensor with 0/4 to 20 mA or 0 to 4 V output, including a variety of GE process control instruments. This feature makes the Moisture Image Series 1 a true multifunction analyzer, providing cost savings through system integration.

The Moisture Monitor Series 3 Analyzer (MMS 3) analyzer is a single- or dual-channel analyzer with a two-line, alphanumeric LCD for moisture, oxygen, temperature and other parameters. It is available as a battery-powered portable with data logging, making it ideal for spot sampling and storing data from one or two locations without reprogramming. It also offers built-in intrinsic safety for all sensor inputs. The MMS 3 is available in rack, bench, panel, weatherproof and explosion-proof packages.

A complete MMS 3 system consists of the MMS 3, a moisture probe, interconnection probe cable and an optional sample system. The MMS 3 can also use the nondepleting oxygen cell to allow oxygen measurement

The Moisture Monitor Series 35 (MMS 35) single-channel hygrometer combines our technologically advanced M Series moisture probe with state-of-the-art electronics for superior speed of response, stability and overall performance.

Measurement range is from ambient to ppb moisture concentrations in a wide variety of gases. It is available in rack, bench, panel and weatherproof packages.

The HygroPro is a loop-powered, intrinsically safe moisture transmitter for measuring the moisture content in gases and non-aqueous liquids in pipeline natural gas, petrochemical, power generation, pharmaceutical, process, and industrial applications. The HygroPro features an aluminum oxide moisture sensor, temperature thermistor, and pressure transducer built on a single probe mount to provide real time measurements for the calculation of parameters such as ppmv in gases, pounds per million standard cubic feet in natural gas, ppmw in liquids and percent relative humidity in addition to dew point temperature.

The HygroPro consists of the replaceable transducer element containing the moisture, temperature, and pressure sensors along with a display and six-button keypad for full programming of the display and analog (4-20mA) and digital (RS485) outputs. The intrinsically safe certified electronics housed in a Type 4X/IP67 enclosure allow the HygroPro to be installed directly in the hazardous location. All calibration data for the moisture and pressure sensors is stored on the replaceable transducer element eliminating the need for manual data entry when changing the element

HygroTrace Ultra-Low Moisture Transmitter measures the moisture content in the parts per billion (PPBv) range in nitrogen and argon gas for applications such as cylinder and tank filling, gas distribution systems in fabrication systems, and tool and machine manufacturing in the semiconductor and ultra-high purity gas (UHP) markets. With over 70 years of experience with aluminium oxide moisture sensors, GE Sensing developed a new aluminium oxide sensor, manufactured with modern semiconductor techniques, which uses a newly patented measurement technique to provide the sensitivity and speed of response in the PPBv range matched only by traditionally expensive analyzers. It is now possible to monitor multiple points of measurements for less than the cost of one analyzer and without installation constrictions. Its unique and innovative sensor measurement technique responds to wet up and dry down conditions in minutes minimizing moisture intrusion in your process.

HygroTrace Transmitter features an integral backlit display and keypad electronics package mounted on a “flow-through” tee sample cell that can be installed directly into the process stream or on a bypass leg of a gas distribution network. HygroTrace measures from 0 to 100 PPBv moisture in nitrogen or argon gas with trending analysis beyond the calibrated range. The accuracy of the measurement is ± 20% of reading or ± 5 PPBv, whichever is greater. HygroTrace offers unprecedented speed of response for aluminum oxide sensors in this very low range with a response time of less than 20 minutes to 95% of a 25 PPBv step change. HygroTrace features analog (4-20mA) and digital (RS485) outputs. HygroTrace’s compact VCR sample tee is designed for installation where space is limited and requires no custom machining

The Moisture Monitor Series 35 IS (MMS 35 IS) portable hygrometer is certified intrinsically safe, is battery powered, and is housed in a damage-resistant case. When purchased with the internal sample system option, a built-in moisture probe and sampling system with process connections are included, making it a completely self-contained hygrometer system. If purchased without the internal sample system package, the MMS 35 IS requires an external moisture probe connected to the hygrometer by a cable.

Other options include computer-enhanced response, data-logging capability and a carrying case that provides protection for the instrument in addition to convenient pockets for accessories.

The PM880 moisture analyzer is a complete, portable hygrometer for measuring the moisture/humidity content of industrial gases and liquids. With the combined experience and expertise of the former Panametrics and General Eastern businesses, the PM880 was designed to meet the most demanding process applications. Utilizing the proven aluminum oxide moisture sensor, the PM880 can express the absolute humidity of gases and liquids in dew point temperature, parts per million by volume (PPMv), parts per million by weight (PPMw), pounds per million standard cubic feet in natural gas, relative humidity, and other measurement units.

The PM880 comes with full data logging capabilities and a built-in infrared port to send data to a PC for detailed analysis and reporting. The PM880 is available as a battery powered application requiring intrinsic safety, or as a non-intrinsically safe version which operates on line power. The PM880 ships in a soft carrying case with zippered compartments, a handle, and a shoulder strap. The case accommodates the PM880, a sample system, flexible hosing, probes with protective covers, MIS Probe electronics module, operating manual, battery pack, power supply or battery charger, and probe cables. The carrying bag is safe for transporting the PM880 and accessories into hazardous areas.

The PM880 AC hygrometer is a complete, portable system with options and accessories to meet all industrial moisture measurement needs. This hygrometer is small, lightweight, and easy to use. The large LCD displays moisture readings in dew point (°C or °F), ppmv, ppmw, lb/MMSCF (natural gas), and a variety of other unit options. Data can be viewed in alphanumeric or graphic formats. A 120 or 230 VAC power supply allows for continuous operation of the analyzer.

The PM880 AC comes in a soft carrying case with zippered compartments, a handle, and a shoulder strap. The case accommodates the PM880 AC, a sample system, fl exible hosing, probes with protective covers, a Moisture Image Series probe electronics module, an operating manual, power supply, and probe cables. The carrying bag is safe for transporting the PM880 AC and accessories around a site.

The MMY245 Moisture Analyzer is a convenient, portable instrument that can quickly spot check the performance of gas dryers for compressed air, breathing air, and pure gas supplies. The planar capacitive sensor combines accurate dew point measurement with fast response time. The sensor is stored in a very dry environment within the analyzer between measurements, which speeds response time.

The MMY245 can be configured according to the desired moisture unit of measure, temperature unit of measure, or other operating parameters. An optional pressure sensor provides real-time correction for concentration units of measure or a pressure constant for use with stable pressure measurements. Voltage outputs 0-5 V DC are standard in non-hazardous areas.

Panametrics 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 Panametrics 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.

Superior Performance

Film thickness of the oxide layer is critical to the performance of this type of sensor. GE manufactures sensors with an oxide film thickness that causes them to exhibit true absolute humidity, rather than relative humidity response. This critical film thickness also gives the M Series probe quick response and exceptional calibration stability

TF Series probes are coupled to Panametrics 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

The three-function TF Series probe measures pressure and temperature, in addition to moisture content. This is because accurate determination of many moisture measurement parameters requires knowledge of the process temperature and pressure. GE eliminated the inconvenience and limitations associated with installing and using separate temperature and pressure sensors by building that capability directly into the TF Series probe. A nonlinear negative temperature coefficient (NTC) thermistor to measure temperature from –22°F to 158°F (–30°C to 70°C) and a choice of five solid-state piezoresistive transducers are available to measure pressures up to 5000 psig (345 bar).

Temperature and pressure input data are used by Moisture Image Series 1 and 2 analyzers, Moisture Monitor Series 3 analyzer and PM880 portable hygrometer to determine parameters such as parts per million (ppm) H2O and relative humidity.

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 –22°F to 158°F (–30°C to 70°C), and a choice of five solid-state piezoresistive transducers to measure pressures up to 5000 psig (345 bar), are available.

Temperature and pressure input data are used by Moisture Image Series 1 and 2 analyzers and the PM880 portable hygrometer to determine parameters such as ppm, lbs/mmSCF and relative humidity