CP-801 pH controller is designed to make measurements in pure water, ultra pure water and sewage. It is one of the new generation controllers with wide range of features and applications. Designed to work in power stations, heat and power plants and water treatment stations. It is a stationary device in a housing resistant to humidity (IP-65).
High measurement accuracy and stability have been ensured. The device has a large, graphic display, showing the pH and temperature readout and the status of each relay simultaneously. It is possible to choose among the displayed information.
Apart from the basic data – pH and temperature – one of the following additional parameters may be chosen to be displayed: information about the relays’ status or information about the last calibration date.
The device is easy to operate, has an English menu. It is equipped with a collective optical signalisation of the correct work and the progress of the controlling process.
Thanks to the modern electronic components the controller’s memory has become fully independent from the power supply.
CP-801 controller has an automatic compensation system, which cooperates with Pt-1000 temperature probe.
The device enables 1, 2 or 3-point calibration of the pH electrode with automatic detection of the buffer solution value, earlier entered bu the user. It is possible to calibrate the meter without the need of disconnecting the outputs.
The controller is powered with standard 230 V voltage, which is galvanically isolated from the input clamps. Optionally it is possible to use different power supply voltage: 110/230/24 V AC, 12 – 24 V DC.
relays (alarm or PID regulation);
isolated digital: RS-485, MODBUS (ASCII and RTU);
isolated current outputs: 0 ÷ 20 or 4 ÷20 mA.
In case of using the relays and exceeding the entered lower or higher limits, the proper relay is switched (minimum and maximum alarm) or fill in or frequency coefficients are changed (for the PID controller).
The meter is equipped with the real time clock with date.
It is possible to connect a remote panel (keyboard with display), which enables controlling the device from up to 1 km distance.
Possibility of the data radio transmission from the measuring head to the controller.
24 months of warranty, quick warranty and after warranty service.

The pH electrode, which cooperates with the device, is placed in a head. In case of pH measurements in tanks we recommend GPZ-1 immersible head with EPX-1t electrode for sewage or GXZ-1t head with suitable pH electrode chosen depending on the type of the measured liquid. The signal is amplified by preamplifier placed in the head.
The pH measurement in pipeline is made with use of the following flow-through heads: GPP-1 with EPX-1t electrode or GXP-1t flow-through head with aproppriate electrode chosen depending on the measurement conditions. For the steel pipelines we offer a special mounting equipment for the pH electrode which is mounted on the thread placed on the pipe and made according to our drawings.
If the pressure in the pipeline is higher than 6 bars use of the lateral circulation with free outflow of small volume of the liquid through the GXP-01 head should be used. In case of using flow-through heads the preamplifier is mounted next to the head.
There is a possibility of wireless data transmission from the head to the controller.

Measured value pH, temperature
pH range 0 ÷ 14 pH
Resolution 0.01 pH ±1 digit
Accuracy (±1 digit) ±0.02 pH*
Imput impedance: >1012Ω
Temperature measuring range: -50 ÷ 200 °C**
Temperature compensation: automatic
Temperature compensation range: -5 ÷ 130 °C
Temperature accuracy: ±0.2 °C*
Sensor calibration: 1, 2 or 3 points
The relays’ parameters: 2A/250VAC/30VDC, PID controlling
Measurement input: isolated
pH datalogger output isolated, 0 ÷ 20 mA or 4 ÷ 20 mA
Temperature datalogger output: isolated 0 ÷ 20 mA or 4 ÷ 20 mA
RS485 output: isolated
Maximal RS485 connection length: 1000 m
Maximal cable length between preamplifier and controller: 200 m
Maximal distance between sensor and preamplifier: 10 m
Power: 240 V 50Hz, for a special order 170VAC÷250VAC, 24VDC/24 VAC
Isolation class: PN-83/T-06500
Radioelectric interference: N level
Dimensions (L x W x H): 215 x 215 x 95 mm
Weight of controller / preamplifier: 1350 g / 120g
Ambient temperature: -20 ÷ 40 °C
Atmospheric humidity / pressure: max. 80% / 80 ÷ 110 kPa
Atmospheric aggressivity level: N/2/AG-U/C
* The accuracy of the meter only.
** The temperature measurement range is limited to the temperature operating range of pH electrode.