Dwyer 668B-13-1 is a compact differential pressure transmitter. It operates in temperatures ranging from 0 to 170°F (-18 to 77°C) and has an accuracy of ±0.8% FS. It requires a power supply of 12 to 32 VDC and has electrical connections on a terminal strip. The output signals include 4 to 20 mA (2-wire), 0 to 10 VDC (3-wire), or 0 to 5 VDC (3-wire). Zero and span adjustments are easily accessible under the small terminal cover. Designed for air and non-conductive gases, with a pressure limit of 15 psig (1.0 bar). The process connection is 3/16" OD barbed brass for 1/8" ID push-on tubing. Encased in stainless steel and PC+ABS alloy with a UL 94 V-0 rating, this transmitter is able to withstand various environmental conditions. It has a thermal effect of ±0.03% FS/°F (±0.054% FS/°C) and is compensated within a range of 40 to 170°F.