Technical specifications of the controller (CA9300).

　　1) Display: 3.5-inch TFT color LCD screen, resistive touchscreen

　　2) Display resolution: 320*240

　　3) Controller dimensions: 144 x 144 x 150 mm

　　4) Operating temperature: -20 to +60°C (no condensation)

　　5) Storage temperature: -20 to +70°C (non-condensing)

　　6) Weight: 2 kg (controller)

　　7) Housing: Aluminum alloy with polyester coating

　　8) Power requirements: 100-240VAC 50/60 Hz ±10%

　　9) Analog output signal: two channels of 0/4 ~ 20 mA current output, load impedance ≤ 500Ω

　　10) Communication: Modbus RS485

　　11) Protection rating: IP65

　　12) Relays: 2 channels, corresponding parameter and temperature upper and lower limit alarms, contact type - SPST normally open, 5A 30VDC, 5A 250VAC

　　13) Cable sealing sleeves: 2 x PG 13, 2 x PG 11

　　14) Altitude: < 2000 m

　　Temperature measurement parameters:

　　1) Sensor types: PT100, PT1000, NTC300

　　2) Measurement range: -5.0 to 105.0°C

　　3) Temperature resolution: 0.1°C

　　4) Accuracy: ≤0.2°C

　　pH measurement parameters:

　　1) Sensor types: composite pH electrode, differential pH electrode

　　2) Measurement range: 0.00~14.00 pH

　　3) Resolution: 0.01 pH

　　ORP measurement parameters:

　　1) Sensor types: composite ORP electrodes, differential ORP electrodes

　　2) Measurement range: -1500 ~ +1500mV

　　3) Resolution: 0.1mV

　　Conductivity measurement parameters:

　　1) Types of conductance sensors: two-pole contact conductive electrodes

　　2) Applicable electrode constants: 0.01, 0.05, 0.1, 0.5, 1, 5, 10

　　3) Electrode constant and conductivity measurement range:

　　0.01 0.01μS - 200μS • cm-1

　　0.05 0.05μS - 1mS • cm-1

　　0.1 0.1μS - 2mS • cm-1

　　0.5 0.5μS - 10mS • cm-1

　　1 1μS - 20mS • cm-1

　　5 5μS - 100mS • cm-1

　　10 10μS - 200mS • cm-1