Name: Enviro Test Construct Water Analysis PH Meter -
SKU: ETCWQPH-233

Technical Specifications

Controller Measurement Variables	Dissolved oxygen, saturation, oxygen partial pressure
Controller Measuring Range	0 mg/L to 20 mg/L, 0% to 200%, 0 hPa to 400 hPa
Controller Resolution	0.01 mg/L, 0.1 %, 1 hPa
Controller Accuracy	±1.5 % FS
Controller Repetition	±0.5 % FS
Controller Output Type	4 mA to 20 mA current transmission output
Controller Max. Loop Resistance	750 Ω
Controller Accuracy	0.1% FS
Controller Output Type	RS485 digital signal output
Controller Communication Protocol	Standard MODBUS-RTU (customizable)
Controller Power Supply	AC220 V ±10%, 50 Hz/60 Hz (optional 24 V ±10%)
Controller Alarm Relay	AC 250 V, 3 A
Sensor Ultra-resistant To Pressure	(0.6 Mpa) wallop, imported (grit mesh metal membrane)
Sensor Up Thread	M32 x 2
Sensor Measuring Range	0 mg/L to 20 mg/L
Sensor Measuring Principle	Current type sensor (polarographic electrode)
Sensor Breathable Membrane Thickness	100 μm
Sensor Electrode Shell Material	PVC or 316 L stainless steel
Sensor Life	>2 years
Sensor Cable Length	5 m
Sensor Measurement Limit	40 mg/L
Sensor Polarization Time	60 min
Sensor Minimum Flow Rate	2.5 cm/s
Sensor Drift	<2% / month
Sensor Measurement Error	<±0.01 mg/L
Sensor Output Current	50 nA to 80 nA /0.1 mg/L Note: Maximum current 3.5 uA
Sensor Polarization Voltage	0.7 V
Sensor Zero Oxygen	<0.01 mg/L
Sensor Calibration Interval	>60 days
Sensor Detection Limit	0.01 mg/L, 68 °F (20 ℃)
Sensor Response Time	2 min 90%, 68 °F (20 ℃)
Temperature Compensation Resistance	Pt 100, Pt 1000, 22 K, 2.252 K, etc.
Sensor Measured Water Temperature	32 °F to 140 °F (0 ℃ to 60 ℃)
Controller Temperature Measurement Type	NTC 10 K / PT 1000
Controller Temperature Measuring Range	14 °F to 140 °F (-10 ℃ to 60 ℃)
Controller Temperature Resolution	32.18 °F (0.1 ℃)
Controller Temperature Accuracy	±32.9 °F (±0.5 ℃)