Product Information
1.conception
pH/ORP-5500 series is a kind of popular and cost-effective online pH and ORP controller , with plug-in pH/ORP-1220 sensor, which have good measurement accuracy, anti-interference,easy to install and operation features.

- White backlight LCD screen,several operations, easy for operation
- Be compatible for six kinds of buffer solution which suitable for international standard.
- Selectable temperature sensor which reduce the replacement cost;
- Manual calibration is easy for on-site calibration.
- EMC enhancement type could run smoothly under kinds of industry environment.
- (4~20)mA output support instrument/transmitter modes and satisfy all 4-20mA receiving unit.
- Double relay high/low and delay control function could fulfill pH or ORP interval control and adjustment.
- Several power supply to be selection according to the different models.Input AC/DC power, no polarity connection.
1.1 Working principle
The weak voltage change is generated when H+affected the inserted sensor, the changeable value will transmit to the instrument. After converting and calculating the generated pH/ORP signal, the instrument will show the values on the screen.
1.2 Application
This series instruments are widely used for online pH/ORP monitoring in environment protection water treatment, pure water treatment, industrial process and so on.
1.3 Classification
Model | Power supply | Frequency(Hz) | Current mode | Sensor selection |
pH/ORP-5500 | DC 24V | ------- | Instrument/transmitter | pH-1220A plug-in sensor; ORP-1220A plug-in sensor or other sensors; TE-1230-14temperature sensor |
pH/ORP-5510 | AC 110V | 50/60 | Instrument/transmitter |
pH/ORP-5520 | AC 220V | 50/60 | Instrument/transmitter |
[NOTE]
1,Put the instrument in dry environment and the water-drop or mositure will cause the damage or measurement error;
2,Pay more attention on the power supply before wiring connection.
1.4 Technique index
model | pH/ORP-5500 series pH/ORP online transmitting controller |
Measurement range | pH | 0.00~14.00 |
ORP | -2000mV~2000mV |
Temp. | (0.0~50.0)℃(temperature compensation component:NTC10K) |
Resolution | pH | 0.01 |
ORP | 1mV |
Temp. | 0.1℃ |
accuracy | pH | 0.1 |
ORP | ±5mV(electronic unit) |
Temp. | ±0.5℃ |
Approximate input impedance | 3×1011Ω |
Buffer solution | pH value: 10.00;9.18;7.00;6.86;4.01;4.00 |
Temp. compensation range | (0~50)℃(with 25℃ as standard) Manual and automatic temperature compensation |
(4~20)mA | characteristics | Isolated,fully adjustable,reverible,instrument/transmitter for selection |
Loop resistance | 500Ω(Max),DC 24V |
accuracy | ±0.1mA |
Control contact | Electrical contacts | Double relay SPST-NO,return model |
Loop capacity | AC 220V/AC 110V 2A(Max);DC 24V 2A(Max) |
Power consumption | <3W |
Working environment | temperature | (0~50)℃ |
humidity | ≤85%RH(none condensation) |
Storage environment | Temp.(-20-60) ℃;relative humidity:≤85%RH(none condensation |
Outline dimension | 96mm×96mm×105mm(H×W×D) |
Hole dimension | 91mm×91mm(H×W) |
installation | Panel mounted,fast installation |
model | Power supply | frequency(Hz) | Current mode | Sensor selection |
pH/ORP-3500 | DC 24V | ------- | Instrument/transmitter | pH-1220B plug-in sensor; ORP-1220B plug-in sensor or other sensors; TE-1230-14 temperature sensor |
pH/ORP-3510 | AC 110V | 50/60 | Instrument/transmitter |
pH/ORP-3520 | AC 220V | 50/60 | Instrument/transmitter |
[NOTE]
- Put the instrument in dry environment and the water-drop or moisture will cause the damage or measurement error;
- Pay more attention on the power supply before wiring connection.