Accurate Gas Measurement in Wet Gas Streams Increasingly stringent air quality sensor specifically engineered to requirements have led to expanded use of wet scrubber systems to control designed for direct insertion into vent air emissions. Chlorine storage stacks, or may be used in a flowcell if facilities and chemical process plants sample can be pumped to the sensor. are frequently required to scrub When remote display and alarm exhaust gas streams to remove relay functions are required, the B12 halogen and acid gases. Unfortunately, monitoring reactive connected to ATI's B14 Alarm Receiver System. This system will provide direct saturated air streams presents digital display of gas concentration, problems for standard diffusion plus 3 alarm setpoints, remote alarm sensors. Condensing water in these air reset input, and retransmitted 4-20 lines can quickly blind diffusion sensors, rendering them inoperable. may be used separately and tied ATI’s Series B12 Wet Gas System was developed to meet the need for other equipment. Either way, the B12 is an excellent solution to a difficult scrubber outlets for other gas streams monitoring problem. that might be saturated with water vapor. Systems have been developed for monitoring strong oxidants (chlorine, bromine, chlorine dioxide, or ozone), acid gases (HCl or HF), and hydrogen. The basic B12 Wet Gas System consists of a loop-powered 2-wire transmitter and a corrosion resistant Take a look at these features: • Direct measuring sensor • Minimal maintenance • Rapid response • Stack mount or flow-through sensor • Transmitter LCD display option • Loop-powered electronics

Vent Stack Double Strap Saddle Customer Readout Device B12 Transmitter Wet Stack Sensor Typical Installation 1-1/4" MNPT 25' Std Cable Length (Supplied by ATI) Specifications Gas Type: Oxidant gases: Cl2, Br2, ClO2, O3 Acid gases: HF, HCl Hydrogen Range: 0-10, 0-20, 0-50, or 0-100 ppm for oxidant or acid gases. 0-2% or 0-10% for hydrogen. Accuracy: Generally ±5% of value, but limited by available calibration gas accuracy. Electronic Repeatability: ±1% of span Electronic Linearity: ±0.5% of span Output: Loop-powered 4-20 mA, 675 ohms maximum at 24 VDC Power: 12-28 VDC Enclosure: NEMA 4X polystyrene,...