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Address: No. 336, Heping Avenue, Wuchang District, Wuhan City

PH3300E Online pH/ORP Meter

As shown in the figure:

● Can be used with various pH and ORP sensors

● Supports tag number entry

● Provides two 4–20 mA current outputs, with optional RS485 output

● Provides three relay outputs (upper and lower limit alarms, and automatic cleaning)

● Automatic temperature compensation

● Provides password-based access control to prevent unauthorized modification of parameter settings

● Supports Chinese/English menu display (default is Chinese at factory settings)

● Provides two 4–20 mA outputs for transmitting the primary measured parameter and the temperature measurement value

● The entire unit meets an IP67 protection rating, allowing for outdoor, open-air installation and operation

Technical Indicators:

Main Functions	Measurement/Display/Transmission/Alarm/Automatic Cleaning
Screen parameters	3.5-inch high-definition monochrome display (320×240)
Measurement range	pH: 0–14.00 pH; ORP: ±2000 mV
Resolution	0.01 pH; 1 mV
Accuracy	±0.01 pH; ±1 mV
Temperature range	0–99.9°C
Temperature compensation thermistor	NTC10K/ NTC2.252K/ PT100/ PT1000
Analog output	Channel 2: 4–20 mA (500 Ω load), accuracy: ±0.2%
Relay output	3-way normally open/normally closed contact output 250 Vac / 30 Vdc / 3 A (max)
Input impedance	≥10¹²Ω
Alarm settings	Upper/Lower Limit Alarm (with configurable lookback and delay)
Power supply	Compatible with 220VAC and 24VDC
Communication interface	RS485
Protection rating	IP67
Relative humidity	<85%
External dimensions	144×152×113mm
Installation size	136×136 mm
Weight	0.8 kilograms