The Panametrics Aurora H2O moisture analyzer uses tunable diode laser absorption spectroscopy (TDLAS) to measure moisture in natural gas rapidly and accurately. Maintaining the proper moisture content of natural gas prevents a number of problems that can include icing damage, corrosion as well as diminished heat content. The Aurora H2O's fast response quickly alerts and documents when moisture concentrations are out of compliance. Once process upsets are corrected, the fast response enables natural gas to be cleared for distribution or use.

The laser-based measurement system provides a response of under 2 seconds and an accuracy of ±2% or 4 PPMV over a range of 5 to 5000 PPMV. The Aurora H2O is suitable for installation in hazardous areas and operates over a wide range of environmental conditions. It was designed for process pressures from 0 to 1500 PSIG and temperatures from -20 to 65°C. A two-stage sampling system eliminates contaminants and reduces pressure to usable limits. A heater may be installed in the enclosure for application in cold climates. All wetted sample system components and the absorption cell are constructed of high quality noncorrosive materials allowing continuous operation for many years with unsurpassed reliability.

The Aurora H2O is equipped with three programmable analog outputs (0/4-20mA) and two digital ports (RS485/232) with MODBUS RTU. It also has an auxiliary 4-20mA input channel for connection to a process pressure transmitter. The Aurora is ideal for connection to data acquisition systems or SCADA systems for long-term monitoring of natural gas quality.

The system is supplied with AuroraView software, a utility that enables the Aurora H2O to interface to a remote personal computer. AuroraView enables remote readout of user-selected parameters, trend graphing, diagnostics and the capture of the spectral scan. Trend data and spectral scans can be saved as ASCII text files, facilitating export and sharing in other application software such as Excel™.

Key Features

• TDLAS technology for fast, accurate moisture measurement in natural gas
• Range: 5 to 5000 PPMV (-65.5°C to –2.6°C dew/frost point)
• Accuracy: ±2% or 4 PPMV
• Response time: <2 seconds
• Sample pressure: 10-25 PSIA, max process pressure: 1500 PSIG
• Operating temperature: -20 to 65°C
• Three programmable 0/4-20mA analog outputs
• RS485/232 digital outputs with Modbus RTU
• Auxiliary 4-20mA input for process pressure transmitter
• Turnkey sampling system for measurement integrity
• User interface: "Through the glass" magnetic buttons
• Hazardous area certifications: cFMus Class I, Div 1, Groups C and D, ATEX & IECEx Ex de IIB T6
• NACE compliant (ANSI/NACE MR-01)
• AuroraView software for remote PC interface, trend graphing, and diagnostics

Applications

• Natural gas quality monitoring
• Pipeline moisture measurement
• Gas processing plants
• SCADA system integration
• Hazardous area installations