Series 4600 Bacharach Gas PLUS Universal Toxic Gas Duct Mount Transmitter

The Scott / EIT / Bacharach Series 4600 Gas PLUS Universal Toxic Gas Transmitter is a universal loop-powered, microprocessor controlled 4-20 mA device which allows any of the Series 4600 toxic gas smart sensors (excluding the Model 88 combustible sensor) to be used for the detection of a specific target gas. When properly installed, non-intrusive operation of the transmitter and an intrinsically safe sensor permit the GasPlus to be operated and calibrated within potentially explosive environments without having to declassify such areas.

GasPlus's specialized electrochemical gas sensors detect target gasses for which they were designed through a series of electrochemical reactions. Gas passes through a gas permeable membrane where it then contacts an electrolyte-saturated membrane. The gas is then oxidized or reduced (depending on the gas) at the sensing electrode, and the reaction is balanced at the counter electrode. In most sensors a third electrode acts as a reference to maintain a fixed potential at the sensing electrode. As gas concentration increases, a corresponding increase in current output occurs. The current output is measured and amplified, then converted by the GasPlus transmitter to a signal on the 4-20 mA loop where it is used to read gas concentration.

The Scott / EIT / Bacharach Series 4600 Gas PLUS Universal Toxic Gas Transmitter is compatible with these sensors, as well as many more:
• Cl₂ Rock Solid 0-3 ppm (model 22)
• NF₃ 0-10 ppm (model 33)
• Teos 0-50 ppm (model 58)
• HCl 0-10 ppm (model 71)
• O₂ 0-25% (model 80)
• CO 0-100 ppm (model 82)
• NH₃ 0-100 ppm (model 85)
• H₂ 0-4% (model 87)
• HCl Rock Solid 0-10 ppm (model 92)
• HBr Rock Solid 0-5 ppm (model 94)