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Indicator Performance 2-wire, no additional power supply required High accuracy and stability Visible in the dark environment 16 Bit ADC MCU inside The scope of the value can be displayed on the LED is -1.9.9.9. ...9.9.9.9. LED can work at 3mA Option: Two OPTO switch outputs Technical data Analogue signal: 2-wire-system: 4...20mA Supply: Supplied by current loop; voltage drop:≤ 4.2V Electrical protection: Short-circuit protection: permanent Reverse polarity protection: no damage, but also no function Display: Type: 4-digit, red LED display, digit height 7 mm, digit width: 4.85 mm(angle 10°) Range: from -1.9.9.9. to9.9.9.9. Accuracy: 0.1% Temperature: Ambient, storage and operation: -20...70oC Ingress protection: IP65