Widely used for online pH monitoring in environmental protection water treatment, pure water treatment, industrial process, agricultural industry etc.Range : pH: 0.0014.00, temp 0.099.9 (temp compensation NTC10K)Buffer solution 10.00; 9.18; 7.00; 6.86; 4.00; 4.01 Temp compensation range 050C (with 25C as standard) manual and automatic temperature compensation. 4-20mA isolated, fully adjustable, reversible 4-20mA output, instrument transmitter mode. Control contact: electrical contact double relay SPST-NO, return mode; load capacity AC220V110V 2A(MAX); DC24V 2A(MAX).Power consumption 3wPower supply AC220v (AC110V, DC24V can be selected)Working environment Temperature0 50C Humidity85% RH (none condensation)Outline dimension: 48mm 96mm 80mm (HWD)