Digital pH detector offers a wide range of electrode options to suit specific industry needs, including combination electrodes for sewage disposal, PTFE electrodes for chemical industries, and specialized high-temperature electrodes for food safety. The built-in alarm relay system offers reliable safety features, with dual alarms for high and low threshold limits.
Specification
| Model |
T-PHCR-PH160 |
| Weight |
1kg |
| Dimension |
96*96*100mm (H*W*D) with hole size 92*92mm |
| Measuring range |
pH: 0~14pH, ORP: -1000~1000mV (-2000~2000mV can be customizable) |
| Accuracy |
±0.02pH, ±1mV |
| Resolution |
±0.01pH, ±1mV |
| Stability |
≤0.02pH/24h, ≤3mV/24h |
| Input impedance |
≥10^12Ω |
| Temperature range |
0~100℃ (NTC 10K, accuracy: ±0.5℃) |
| Temperature compensation |
0~100℃ manual/automatic |
| Output signal |
Isolated 4-20mA signal (error: ±0.2%, under maximum loop resistance 750Ω) |
| Communication function |
RS485 with standard MODBUS-RTU (Now RS485 software is free.) |
| Power supply |
AC 220V±10%, 50Hz/60Hz
DC 24V |
| Alarm relay |
2 alarm relays: AC 250V/3A
Function: high alarm, low alarm |
Digital pH Meter User Manual
Feature
- The pH meter offers a range of customizable user settings, including language selection, buzzer control, LCD backlight adjustment, and password protection for added security. Users can also configure the pH/ORP electrode selection, choose between manual or automatic temperature compensation, and perform pH/ORP calibration. Additionally, the device allows for modification of pH/ORP and temperature settings, setting high/low alarms for pH/ORP levels, and selecting output signal options such as 4-20mA and RS485, providing flexibility to meet various application needs.
- Equipped with an internal industrial watchdog to prevent the device from crashing.
- 2.4-inch LCD display for clear and easy readings.
- Excellent anti-interference performance for reliable measurements.
- Supports both manual and automatic temperature compensation.
The pH meter and pH/ORP electrode selection:
| pH/ORP electrode |
Industry |
Temperature range |
Advantage |
| Pure water pH electrode |
Drinking water |
0-60℃ (32-140℉) |
The pH calomel electrode can be used in strong acid or alkali. |
| PTFE pH electrode |
Chemical |
0-60℃ (32-140℉) |
The electrode shell is made of PTFE, suitable for corrosive solution (strong acid or alkali), has longer life in harsh environments. |
| pH glass electrode |
Sewage disposal / food |
0-95℃ (32-203℉) |
Direct lead, double-layer glasses. |
| Desulfurization pH electrode |
Desulfurization |
0-60℃ (32-140℉) |
Flat electrode, strong anti-pollution ability and longer life |
The pH/ORP meter diagram of ports definition:
- INPUT: Measuring terminal of the electrode
- REF: Reference terminal of the electrode
- NC: Undefined
- TEMP2: Temperature compensation terminal 2
- TEMP1: Temperature compensation terminal 1
- RS485 (A+): RS485 communication interface A+
- RS485 (B-): RS485 communication interface B-
- 4-20mA (+): 4-20mA output terminal +
- 4-20mA (-): 4-20mA output terminal -
- AC 220V (L) or DC 24V (-): AC 220V liver wire or DC 24V negative
- AC 220V (N) or DC 24V (+): AC 220V liver wire or DC 24V positive
- LO: Normally-open relay for low alarm
- HI: Normally-closed relay for high alarm
Communication:
RS485 communication data and register address as follows:
| Address |
Data type |
Function code |
Explanation |
Access right |
| 0x0000 |
unsigned short |
0x03 |
pH value (default in two decimals) |
Read only |
| 0x0001 |
unsigned short |
0x03 |
Temperature value (default in one decimals) |
Read only |
| 0x0002 |
short |
0x03 |
ORP value (signed integer) |
Read only |
Tips: What is ORP and why is it important?
ORP (Oxidation-Reduction Potential) measures the ability of a solution to either accept or donate electrons. It is a critical indicator in water treatment, chemical reactions, and biological systems. ORP helps determine the oxidative or reductive properties of the solution, which can indicate the presence of pollutants, chemical reactions, or the effectiveness of disinfection.
