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DPH digital pH meter

Water in and out of waterworks

Water quality monitoring of municipal pipe network

Industrial process discharge and recycling water quality monitoring, circulating cooling water monitoring, activated carbon filter water monitoring, membrane filtration water monitoring, boiler feedwater monitoring

The pH analyzer consists of a measuring electrode, a temperature sensor, a signal processing module, and a transmitter. The first three parts form a digital pH sensor. Adopting the classical electrochemical principle, using a working electrode composed of a measuring electrode that is sensitive to changes in the pH value of the solution and a reference electrode with a constant potential, the pH value is measured online. Into digital signals, the digitized electrode transmits the final signal to the transmitter through RS485, and finally completes functions such as display and output.

● High impedance differential input, suitable for applications in different occasions;

● Digital sensor, greatly improve the anti-interference ability of the sensor.

● Increasing the sensor cable to hundreds of meters can still ensure high-precision measurement;

● Sensor plug and play, the system automatically recognizes and supports multi-channel measurement;

● Digital sensors can be calibrated in the laboratory and used directly after installation on site, which is especially important when replacing and repairing;

● The transmitter can provide isolated RS232 / RS485 digital interface and support communication protocols such as MODBUS;

● Programmable relay output: Any relay can be set to high alarm, low alarm, timer mode;

● It has the function of automatic saving of historical data, which can store historical data information for 10 years.

Measuring performance

Range: 0 ~ 14.0pH, -20 ~ 60 ℃

Resolution: 0.01PH, 0.1 ℃

Accuracy: ± 0.1pH; t: ± 0.2 ℃

Temperature compensation: automatic temperature compensation (0 ~ 80 ℃)

Calibration: buffer calibration, sample calibration, calibration information is stored in the sensor

Display: LCD display date, time, measured value, historical trend line, etc., Chinese and English operation menu is optional

Data storage: automatic storage function, power failure data protection, can store and query 10 years of historical data


Analog output: two isolated 4 ~ 20mA, maximum load 750Ω, optional output current in fault state

Relay output: 3 programmable relays, which can be set as alarm function and timing function

Relay capacity: 2A, 250VAC

Digital interface: MODBUS RS232 / RS485, Profibus DP optional

Field setting: done by the transmitter button

powered by

AC power supply: 85 ~ 265VAC, 50Hz / 60Hz

DC power supply: 24VDC ± 10%

Physical properties

Transmitter size: 270 × 205 × 100mm

Sensor size: Φ40.5 × 300mm

Material: Transmitter: PC + ABS

Sensor: 316L stainless steel + POM

Connection: 1 inch tapered male thread

Environmental performance

Protection level: Transmitter: IP65

Sensor: IP68

Working temperature: Transmitter: -20 ℃ ~ 60 ℃

Sensor: 0 ℃ ~ 60 ℃

Relative humidity: 0 ~ 95%, non-condensing

Working pressure: 0 ~ 4Bar, 6Bar can be customized