The OLCT 200 fixed gas-detection transmitter is designed for use with multiple gas detection technologies, including electrochemical, catalytic bead, infrared and photoionization-detection sensors. This allows the OLCT 200 to detect many typical gases, and provides users the ability to standardize on one transmitter for all of their gas detection needs. Two different gases can also be monitored simultaneously. The device can be configured for two- and three-wire 4–20-mA analog output, Modbus RTU digital output, HART communication and wireless communication. Configurations can be used in explosion-proof and intrinsically safe applications, and the transmitter has been approve for use in hazardous locations by CSA. — Industrial Scientific — Oldham S.A.S., Arras, France