Dwyer 685-09-V is a differential pressure transmitter with a temperature range of -4 to 158°F (-20 to 70°C). It has an accuracy of ≤ ±0.5% RSS (BFSL), ± 1Pa and a response time of 1 s (default) or 200 ms (user selectable). With an IP54 enclosure rating, it is suitable for use in various environments. The transmitter features a piezoresistive pressure sensor and can handle up to 95% RH humidity. It has electrical connections using a spring connector and offers both 2-wire (4-20 mA) and 3-wire (0-10 V) output signals. The voltage requirements are 2-wire: 18-30 VDC and 3-wire: 18-30 VAC/DC. It can be mounted using screw fastening and is suitable for air and non-corrosive gases. The transmitter is made of ABS material and has a loop resistance of 2-wire: 500 Ω max and 3-wire: ≥ 1 kΩ (≤ 10 mA). It has a 6 mm hose connection and dimensions of Ø 66 x 28 mm. The stability is ≤ ±1% RSS per year and it comes with a cable conduit with a cap nut conduit made of polyamide, measuring 15 mm (across flats). The maximum current draw is 2-wire: 21 mA and 3-wire: 40 mA.