On the basis of ensuring performance, the functionality has been simplified, resulting in a particularly strong price advantage. Clear display, easy operation, and excellent testing performance make it highly cost-effective. It can be widely used for continuous monitoring of pH values in solutions such as thermal power, chemical fertilizers, metallurgy, environmental protection, pharmaceuticals, biochemistry, food, and tap water.

TECHNICAL INDEX
Display mode: LED (digital tube) display, high brightness, eye-catching and intuitive, with a long visible distance
Measurement range: 0～14.00pH，- 1999～+1999mV， 0～99.9℃
Temperature compensation range: automatic/manual 0-99.9 ℃, converted to 25 ℃, converted to pure water and ammonia added ultrapure water at 25 ℃
resolving power: 0.01pH，0.1mV，0.1℃
Accuracy: ±0.05pH，±1mV，±0.3℃
Input impedance:> ten¹²Ω
Current isolation output: The software is set to 0-10 mA (load<1.5 k Ω) or 4-20 mA (load<750 Ω), and two 4-20 mA channels are optional;
Alarm relay: AC220V、3A， Alarm signal isolation output.
Communication interface: Isolated RS485 (optional)
Power supply: AC220V ± 22V, 50Hz ± 1Hz, optional DC24V ± 2.4V
Protection level: IP65
Working conditions: ambient temperature 0-60 ℃, relative humidity ≤ 90 ℅

Power off storage:>10 years
Weight and size: 0.8kg, 96 × 96 × 110 mm
Hole size: 92x92mm;
Secondary meter installation method: perforated type
Electrode installation methods: flow-through/submerged/flange/pipeline
Standard configuration
One pH-801 secondary meter, one 405-60 pH electrode, and one pack of pH (4, 7, 9) standard buffer solutions.
main features
Microcomputerization: Using high-performance CPU chips, high-precision AD conversion technology, and SMT surface mount technology, it completes multi parameter measurement, temperature compensation, automatic range conversion, instrument self-test, with high accuracy and good repeatability.
High reliability: Without complex functional switches and adjustment knobs.
Strong anti-interference ability: The current output and alarm relay adopt photoelectric coupling isolation technology, which has strong anti-interference ability and enables remote transmission.
Automatic alarm function: Alarm signal isolation output, alarm upper and lower limits can be set arbitrarily, alarm hysteresis cancellation.
Industrial control watchdog: ensures instruments do not crash
Network function: isolated current output and RS485 communication interface; The upper and lower limits of the output corresponding to the pH value of the current can be set arbitrarily, and the hysteresis can be adjusted within a range of 0-7.00pH.
Automatic conversion of pH value of standard solution: The temperature curve of the standard solution is pre stored, and the pH value of the standard solution at the set temperature is automatically converted during calibration.
Automatic identification of incorrect calibration: If the user uses standard buffer solution incorrectly during calibration, the instrument will automatically prompt.

Is the pH electrode equipped with two composite pH electrodes or three composite pH electrodes;
2. The length of the electrode cable for the pH meter is not specified and should be set at 5m;
3. Installation method of PH electrode.
4. Power supply, not specified as AC220V.