WH-PH Sensor and Meter

WH-PH Sensor and Meter Product Overview：

The instrument adopts LCD display screen; intelligent menu operation; with current output, free setting of measurement range, high and low over-limit alarm prompt and two sets of relay control switches, adjustable hysteresis range; automatic or manual temperature compensation; various electrodes automatic calibration method.

According to user needs, we can provide pH (or ORP) electrodes with various installation processes such as [flow type] [submerged type] [pipe type] [flange type].

Working principle：

The instrument consists of signal measurement, calculation, display, network communication and panel instructions. The transmission impedance transformation of pH and temperature changes pH into a low resistance signal of 59.16mV/pH (25°C); NTC is transformed into a voltage signal.

The meter is matched with a pH (or ORP) electrode to monitor the pH (or ORP) value of the pH of the solution. The sensor is a battery composed of a pH (or ORP) glass electrode and a calomel (or Ag/AgCl) reference electrode. The Nernst equation yields a potential difference related to the pH of the solution: Ex=Eo+SpH.

The potential difference is amplified by a preamplifier with high input impedance, and the thermal element sends a signal corresponding to the temperature value. After the two sets of signals are amplified, they are converted by A/D, and operated by a single-chip microprocessor through the I/O interface chip. is displayed prominently on the display.

WH-PH Sensor and Meter is an on-line water quality monitor with a microprocessor.It is configured with different types of pH (or ORP) electrodes.

Product features:

• Intelligence:

Ph (or ORP) value measurement, temperature measurement and compensation are accomplished by a single chip microprocessor

• Double High Resistance pre-amplifier:

High input impedance, anti-noise, anti-interference ability;

• Three calibration methods

One-point calibration, two-point calibration and known concentration calibration;

• Man Machine Dialogue:

The menu operation structure, the user can operate according to the    prompt on the screen;

• The same screen display multi-parameters:

Show pH (or ORP) value, temperature value and working state at the same time;

• Set output mode by software:

Select 0-10mA or 4-20mA output by software;

• Free set alarm upper and lower limit;
• Two groups of relay control switches, hysteresis control range adjustable;
• Self-set password: users can set or modify the password, so as to avoid irrelevant personnel misoperation;