The Eutech alpha DO 500 1/4-DIN 2-wire dissolved oxygen transmitter features improved circuitry design that prevents ground loop effects and provides high reliability in the measurement of Dissolved Oxygen. With advanced diagnostic capabilities, excellent flexibility and minimal maintenance, the alpha 500 series transmitters are the perfect instruments to complete your systems in aquaculture, chemical processing or water and wastewater treatment industries. Product Features :: Easy installation and operation Advanced diagnostics like ‘out-of-range’ and ‘hold’ indicators help in monitor and process control. Clear annunciators and easy-to-read dual-line display enables instantaneous view of measured readings and set-up configurations for effortless installation and operation. In addition, scalable 4 to 20 mA current output resolution ensures better resolution at chart recorder or other peripheral devices. Suitable for indoor and outdoor use with its IP65-rated weatherproof housing, the alpha 500 series transmitter can be wall or panel mounted according to industrial requirements. :: Fuss-free, easy maintenance Intuitive push-button user-interface ensures easy calibration and set-up for everyone. The offset adjustment feature enables you to correct readings conveniently without the need to remove the electrode on-site. :: Optimal performance in demanding applications The alpha 500 series transmitter prevents output interference due to electrical noise or leakage from the input source. Cross-talk between multiple transmitters in a serial loop is eliminated for better accuracy. In addition, operations are not disrupted even if one unit requires maintenance as the transmitters operate on a 12 to 24 V D.C. power supply. Specifications Product Specification Description DO range mg/l of oxygen: 0.00 – 20.00 mg/l or 0.00 to 19.99 ppm % saturation of oxygen: 0.0 to 200.0% saturation Resolution & Accuracy 0.01 mg/l or 0.01 ppm or 0.1% 1.5% full scale Temperature range 0.0 to 100.0 °C Resolution & Accuracy 0.1 °C / ±0.5 °C Temp Sensor Pt100 (2 wire or 3 wire) Temp. Compensation Auto / Manual (0 to 50 °C Temp. Coefficient 0 to 10 °C (Selectable) Pressure Compensation 0.74 to 3.00 bar; 55 to 225 cmHg; 10.7 to 43.5 PSI (Manual setting and Automatic correction) Salinity Compensation 0.0 to 50.0 ppt (Manual setting and automatic correction) Input Asymmetrical / Symmetrical Transmitter Output Range 4.0 to 20.0 mA Over/ Under Range Current Output 3.8 mA : 'ON' selects 3.8 mA 'OFF' selects 4 mA (under range) selects 20mA (over range) Hold Current Output 22mA : 'ON' selects 22 mA 'OFF' selects last measured current value Display Dual Display Custom LCD Power Requirements 12 to 24 VDC Load Resistance Max. 600 W Ingress Protection IP65 protection against dust and water jets (Wall or panel mount) Dimension 96 x 96 x 66 mm (3.78 x 3.78 x 2.6 inch) Weight 210 g