Waterproof Grade IP68 - High Stability, Low Power Consumption, and High Integration Level Three-point Calibration Data - Transmitter internal use of axial capacitance filtering, 100M resistor to increase the impedance to enhance stability. Bulb - special thickened bulb, new upgradedstyle more accurate, more beautiful Area of Application - This Device is Suitable for Online Monitoring in the Fields of Chemical Industry, Printing and Dyeing,Etc. Measurement Parameters:pH, EC, Temperature Measurement range: pH: 0 to 14pH EC:0-2000S or cm Temperature:0-60 Accuracy:0.03pH 1.5 percent 0.2 Resolution:0.01pH 0.1uS or cm 0.1 Output signal:RS485(standard Modbus-RTU protocol, device default address:01) Supply voltage:7-24VDC Working environment:Temperature:0-60 Humidity:less than equal 100 percent RH Type:D:Steels with Display Colour:Blue Material:PlasticandMetal Package Contents: 1 x Industrial Sewage Monitor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.