PH Online Monitoring Device HM-SPH

Product Overview

PH online monitoring device is a commonly used instrument and equipment, mainly used for precise measurement of the acidity/alkalinity/redox potential of liquid media, widely used in industries, agriculture, scientific research, environmental protection and other fields.

Measuring principle

The measurement electrode is immersed in a solution, and 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 built-in microcomputer circuit of the controller obtains the pH value by measuring the battery voltage.

Standard liquid configuration

When shipping, three packages of pH standard buffer solution are randomly included, namely 4.01, 6.86, and 9.18 standard buffer solutions.

PH standard solution configuration

4.01 PH standard solution

Put 4.01 standard buffer solution into a container, mix with 250mL of purified water, and stir evenly before use.

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

PH calibration

Place 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, then enter the value of this standard solution and press ENTER to confirm storage.

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

The system automatically calculates parameters. If there are still errors after calibration, please recalibrate.

Attention: 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

Multiple automatic calibration functions

Multiple signal output modes

Manual and automatic temperature compensation

Three sets of relay control switches

High limit, low limit, hysteresis control

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

Technical Specifications: 

Product Name: Online PH/ORP Meter

Product Model:

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

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

Relay: Three sets of 5A 240VAC/5A 28VDC or 120VAC

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

Current output: standard configuration includes 2 channels of 4-20mA

Communication output: Standard RS485 Modbus RTU

Dimensions: 215 * 125 * 80mm

Hole size:-

Protection level: IP65

Installation method: Wall mounted

Instrument weight: 1.5kg

Environmental temperature: -10~60 ℃; Relative humidity: ≤ 90%; There is no strong magnetic field interference around except for the Earth's magnetic field

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