SUP-pH8.0 pH CONTROLLER SUPMEA

SUPMEA SUP-pH8.0 pH / ORP Meter (Industrial pH / ORP Controller)

SUPMEA SUP-pH8.0 pH Controller is an online pH and oxidation-reduction potential (ORP) measuring and controlling device for installation on the front panel of industrial control cabinets. It supports measurement of pH, ORP, and temperature, and the data can be used in water quality control systems, wastewater treatment systems, and production processes that require continuous monitoring of the solution's condition.

The device supports a pH measurement range of -2.00 to 16.00 pH with an accuracy of ±0.02 pH when using a general-purpose pH sensor, and supports ORP measurement in the range of -1999 to +1999 mV with an accuracy of ±0.1% F.S. It also comes with automatic and custom temperature compensation functions.

SUP-pH8.0 features a 4.3-inch color LCD screen with a resolution of 480 x 272 pixels, supports analog output of 4-20 mA, and communication via RS485 using the Modbus RTU protocol. It can be connected to PLC, HMI, SCADA, or any compatible control system.

The device has two relay outputs for control or alarm signaling, supports electrode cleaning schedule settings, and includes a data logging system capable of storing 100 sets of data in FIFO format. It operates on 100-240VAC power and has an IP65 protection rating according to the manufacturer's specifications.

General Specifications

• Brand: SUPMEA
• Product Model: SUP-pH8.0
• Product Type: Industrial pH / ORP Controller
• Supports measurement of pH, ORP, and temperature
• pH measurement range: -2.00 to 16.00 pH
• pH accuracy: ±0.02 pH for general-purpose pH sensors
• Supports Antimony-type pH sensors with accuracy as per manufacturer specifications: ±0.2 pH
• ORP measurement range: -1999 to +1999 mV
• ORP accuracy: ±0.1% F.S.
• Temperature measurement range: -10.0 to +130.0°C
• Supports NTC10K and PT1000 temperature sensors, with PT100 as an option
• Supports Manual and Automatic temperature compensation
• 4.3-inch color LCD screen with resolution of 480 x 272 pixels
• 1 channel of 4-20 mA analog output, with 2-channel option available
• Supports RS485 Modbus RTU communication
• 2-channel relay output, Normally Open type
• Supports setting of cleaning schedule for electrode system
• Can store 100 data sets using FIFO format
• Supports Panel Mounted installation
• Power supply: 100-240VAC, 50/60Hz

Maximum Power 5W

IP65 Protection Rating According to Manufacturer's Data

Technical Specifications

Specifications	Details
Brand	SUPMEA
Model	SUP-pH8.0
Product Type	Industrial pH / ORP Controller
Measured Variables	pH / ORP / Temperature
pH Measuring Range	-2.00 to 16.00 pH
pH Accuracy (Normal Sensor)	±0.02 pH
pH Accuracy (Antimony Sensor)	±0.2 pH
ORP Measuring Range	-1999 to +1999 mV
ORP Accuracy	±0.1% F.S.
Temperature Measuring Range	-10.0 to +130.0°C
Temperature Sensor	NTC10K / PT1000 (PT100 Optional)
NTC10K Accuracy (-10 to 60°C)	±0.3°C
NTC10K Accuracy (60 to 130°C)	±2.0°C
PT1000 / PT100 Accuracy	±0.3°C
Temperature Compensation	Manual / Automatic
Input Resistance	≥1012 Ω
Display	4.3-inch True Color LCD
Display Resolution	480 x 272 Pixels
Language	Chinese / English
Analog Output	4-20 mA, 1 Channel (2 Channels Optional)
Maximum Analog Output Load	750 Ω
Analog Output Accuracy	±0.2% F.S.
Communication Interface	RS485
Communication Protocol	Modbus RTU
Relay Output	2 Channels, Normally Open
Relay Contact Rating	245VAC / 5A Max. (Datasheet Rating)
Electrode Cleaning	Manual Cleaning / Configurable Cleaning Interval
Data Record	100 Sets, FIFO
Operating Temperature	0 to 60°C
Storage Temperature	-20 to +70°C
Relative Humidity	10-85% RH, Non-Condensing
Power Supply	100-240VAC, 50/60Hz
Power Consumption	5W Maximum
Mounting Method	Panel Mounted
Overall Dimensions	144 x 144 x 115 mm
Panel Cutout	138 x 138 mm
Panel Thickness	1.0-5.0 mm
Weight	Approximately 0.68 kg
Ingress Protection	IP65

Working Principle of pH / ORP Controller

SUPMEA SUP-pH8.0 receives signals from pH or ORP measuring electrodes, then processes and displays the values on the LCD screen. The measured values can be used for control and monitoring systems through output 4-20 mA, RS485 or relay according to the usage format.

pH measurement relies on measuring the electric potential difference related to the activity of hydrogen ions in the solution, while ORP measurement is the detection of oxidation-reduction potential, which is an indicator of the chemical condition of the solution. Appropriate sensors and settings are required for the parameters to be measured.

The device supports Manual or Automatic temperature compensation to adjust the pH measurement processing according to the temperature of the solution and the electrode response.

Measurement and Control Functions

• pH Measurement: Measures acidity and alkalinity in the range of -2.00 to 16.00 pH
• ORP Measurement: Measures oxidation-reduction potential in the range of -1999 to +1999 mV
• Temperature Measurement: Measure temperature and use it for pH compensation
• 4-20 mA Output: Send analog signal to PLC or control system
• RS485 Modbus RTU: Send digital data to compatible communication devices
• Relay Output: Used to send alarm signals or control circuits according to settings
• Temperature Compensation: Support automatic and custom temperature compensation
• Data Recording: Record 100 sets of data using FIFO format
• Electrode Cleaning Setting: Support setting electrode cleaning intervals according to system capability

Usage with Control Systems

Analog Output 4-20 mA

The device has one standard 4-20 mA output channel, and has an option of two channels for sending measurement values to PLC, Data Logger or other control systems that support current input. Please check the scaling and output format from the device manual.

RS485 Modbus RTU

Supports communication via RS485 interface and Modbus RTU protocol, suitable for connecting HMI, PLC and SCADA systems. Please configure communication settings and use Modbus Register according to manufacturer documentation.

Relay Control

There are two Normally Open relay channels for sending alarm signals or controlling external devices. Please check contact ratings, power failure conditions and appropriate protection circuits before controlling pumps or electrical loads.

Installation and Setup

• Check product model and components before installation
• Select pH or ORP probe suitable for the properties of the solution
• Prepare a mounting slot size of 138 x 138 mm
• Check the thickness of the mounting panel to be within the range of 1.0-5.0 mm
• Install the device in an appropriate position and protect from moisture or temperatures exceeding the rating
• Connect the power supply 100-240VAC according to the wiring diagram and safety requirements
• Connect the measurement electrode and temperature probe according to the manufacturer's manual
• Set the pH or ORP mode to match the probe in use
• Calibrate the measurement system before actual use according to the manual
• Set the 4-20 mA signal range or RS485 communication according to system requirements

Test the relay system and alerts before using to control actual devices

Set up cleaning and calibration schedules for the sensor according to process conditions

Examples and Application Guidelines

• Measure and control pH values in wastewater treatment systems
• Monitor water quality in production processes
• Water conditioning and chemical dosing systems
• ORP monitoring systems in water treatment processes
• Chemical and petrochemical industries
• Water production and utility systems
• Online monitoring systems connected to PLC or SCADA
• Industrial processes requiring continuous monitoring of acidity and alkalinity

Considerations

• Select pH or ORP sensors suitable for the solution, temperature, and process conditions
• Check the actual delivered sensor, mounting hardware, and accessories before ordering
• The 2-channel 4-20 mA output is an optional feature, not a standard feature of all units
• The PT100 sensor is an optional feature according to the manufacturer's data
• The RS485 connection must be configured with the protocol and communication parameters matching the destination system
• Use appropriate protection circuits and control devices when using relays to control electrical loads
• The electrode cleaning system must check the accessories and connections before actual use
• Installation of the front panel must consider sealing methods and installation conditions to maintain the IP65 protection level
• Regular calibration and maintenance of the sensor are required to ensure reliable measurement results