Range: mg/L O?: 0.00–50.00 mg/L % Air: 0–500% Temp.: –5.0 to +55.0°C Accuracy: mg/L O?: ±1% ±1 Digit % Air: ±1% ±1 Digit Temp.: ±0.1% ±1 Digit Temperature Compensation: Automatic compensation from –5.0 to +55.0°C Pressure Compensation: Automatic compensation from 500 to 1100 mbar Salinity Compensation: Manual compensation setting from 0.0 to 70.0 ppt Analog Output 1: Isolated 4–20 mA output, programmable corresponding to DO measurement Analog Output 2: Isolated 4–20 mA output, programmable corresponding to temperature measurement Relay: Two sets of ON/OFF outputs, programmable high/low points with hysteresis Cleaning Contact: One set of ON/OFF output, time-controlled via program Operating Temperature: –20 to 50°C Power Input: 88–265 VAC wide-range power supply, 50/60 Hz Protection Rating: IP65 Dimensions: 144 mm × 144 mm × 115 mm (H × W × D) Panel Cutout: 138 mm × 138 mm (H × W) Mounting: Wall mount, panel mount, or round pipe hanging Weight: 0.8 kg