PH online monitor

roduct Overview

PH online monitor is a commonly used instrument, mainly used to accurately measure the pH/redox potential of liquid media, and is widely used in industry, agriculture, scientific research, environmental protection and other fields.

Measurement principle

The measuring electrode is immersed in the solution, and the H+ ions generate a battery voltage between the electrode membrane and the solution. The battery voltage generated by the electrode is proportional to the pH value. The controller has a built-in microcomputer circuit to obtain the pH value by measuring the battery voltage.

Standard solution configuration

When shipped, three packs of PH standard buffer solutions are randomly included, namely 4.01, 6.86, and 9.18 standard buffer solutions.

PH standard solution configuration

4.01 PH standard solution

Put the 4.01 standard buffer solution in a container, add 250mL of pure water, and stir evenly before use.

The configuration method of 6.86 and 9.18 standard buffers is the same as that of 4.01 standard buffer.

PH calibration

Put the PH electrode into standard solution No. 1 (4.01 or 6.86), enter the calibration menu-low point calibration, wait for about 5 minutes to stabilize, enter the value of this standard solution, and press ENTER to confirm and save.

Put the PH electrode into standard solution No. 2 (9.18 or 6.86), enter the calibration menu-high point calibration, wait for stabilization (about 5 minutes) and enter the value of this standard solution, and press ENTER to confirm and save.

The system automatically calculates the parameters. If there is still an error after calibration, please recalibrate.

Note: The standard solution used for high point calibration must be larger than the standard solution used for low point calibration.

Instrument features:

❊Dot matrix LCD screen display

❊Intelligent menu operation

❊Various automatic calibration functions

❊Various signal output modes

❊Manual and automatic temperature compensation

❊Three groups of relay control switches

❊High limit, low limit, hysteresis control

❊Display pH/ORP, temperature, status, etc. on the same interface

Technical parameters:

Product name: Online PH/ORP meter

Product model:

Measuring range: pH: 0-14.00 ORP: -2000+2000mV Temperature: 0-150℃ (depending on the electrode)

Measurement accuracy: pH: ±0.02pH ORP: ±1mV Temperature: ±0.3℃

Temperature compensation: automatic or manual

Resolution: pH: 0.01pH ORP: 1mV Temperature: ±0.1℃

Stability: pH: ≤0.01pH/24h; ORP: ≤1mV/24h

Relay: three groups 5A 240VAC/5A 28VDC or 120VAC

Power supply: 85～265VAC or 9～36VDC, power: ≤3W

Current output: 2-way 4-20mA as standard

Communication output: RS485 Modbus RTU as standard

Dimensions: 215*125*80mm

Opening size: –

Protection level: IP65

Installation method: wall

Instrument weight: 1.5kg

Ambient temperature: -10～60℃; Relative humidity: ≤90%; No strong magnetic field interference around except the earth’s magnetic field