Binary Gas AnalyzerBGA244 — Gas ratio measurement to 0.1 % accuracy * Measures ratio of two gases • Analyzes purity of a single gas • <0.1 % accuracy (typ.) • Touch screen display • Data acquisition software (BGAMon) • 4 Hz measurement rate • USB, RS-232 and RS-422 • BGA244... $3950 (U.S. list) The BGA244 Binary Gas Analyzer quickly, continuously, and non-invasively determines the ratio of gases in a binary mixture, or checks the purity of a single gas. It’s ideal for a host of applications including binary gas blending, PSA (pressure swing adsorption), helium recovery, dopants in carrier gases, ozone purity and general research where precise measurements of gas mixtures are necessary. The BGA244 operates without lasers, filaments, chemical sensors, optical sources, separation columns, reference gases, or reagents, and runs virtually maintenance-free. Principle of Operation The speed of sound in a gas depends on the temperature, specific heat, and the molar mass of the gas. By precisely measuring the speed of sound and temperature in a gas mixture, and knowing the thermodynamic properties and molar masses of the gases, the BGA244 determines the composition of gas mixtures with an accuracy of about 0.1 %. Operating Modes The BGA244 has three basic measurement modes: Binary Gas Analyzer, Gas Purity Analyzer, and Physical Measurements Analyzer. Stanford Research Systems phone: (408)744-9040 www.thinkSRS.com

Binary Gas Analyzer mode In Binary Gas Analyzer mode, the ratio of two gases is reported. In Gas Purity Analyzer mode, the purity of a single gas is reported. In Physical Measurements mode, the BGA244 reports the speed of sound, temperature, and gas pressure. This extends the BGA244’s utility beyond gas analysis, for example, to enable the measurement of thermodynamic properties of gas mixtures. Gas Purity Analyzer mode Gases can be chosen by name, formula, or CAS number on the touchscreen display or over the computer interfaces. In each mode, the BGA244 displays large numeric readouts of the...

Heaters, Relays, I/Os & Power The BGA244 comes equipped with several multipurpose analog I/Os, two user-defined event relays for process control or alarms, and cavity heaters for temperature regulation and condensation prevention. There is an input for an external 24 VDC power supply. Many customers will choose to order the optional BGA-24 power supply which can supply +24 VDC to the BGA244. Communication With the standard RS-232, RS-422 and USB computer interfaces, all instrument functions can be set and queried remotely. The instrument can operate independently or via a host computer. A Windows...

Serial Communication BGA244 Specifications Operating temperature Temperature resolution Temperature accuracy Speed of sound range Speed of sound resolution Speed of sound accuracy Concentration accuracy Measurement rate Exponential averaging -20 °C to +70 °C 0.001 °C ±0.1 °C 100 to 1500 m/s 0.001 m/s ±0.05 % (1 atm argon at 200 sccm) ±0.1 % typ. (species dependent) 4.4 Hz Off, or 2 to 100 periods WHQL high speed USB 2.0 2400 to 115,200 baud 2400 to 115,200 baud Cavity USB power +24 V Current Wetted materials Volume Operating flow rate Min. operating pressue (psi) <5 psia typ. (species dependent)...