pH/ORP Controller & Transmitter APX2-G4

Featuring differential ground technology to eliminate solution interference, this premium analytical instrument supports flexible 3 or 5-point pH calibration and 2-point ORP calibration while logging detailed time-stamped historical data and up to 100 calibration maintenance entries.

  • Measuring Parameter: pH 、ORP
  • Delivery time: 2-5 weeks
  • MOQ: 1
  • Price: Contact Us
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Standard

Model APX2-G4
Principle

pH: Glass pH electrode (hydrogen ion concentration index)

ORP: Platinum or gold electrodes (redox potential)
Solution Ground Differential ground
Display Range pH: 0~14pH, ORP: ± 2000mV, Temp: -10~150
Resolution pH: 0.01pH, ORP: 1mV, Temp: 0.1℃
Accuracy 0.1% of the measuring range or ±0.02pH / ±2mV, take the larger one
Stability 0.05% of measuring range every 24 hours without accumulation
Repeatability Better than 0.1% of measuring range
Temp Compensation Automatic or manual (NTC10K/PT1000 @customized)
25℃ Conversion Support
Relay Output Two SPST relays, Max. load 3A/250VAC, set high/low alarm, temp. or clean control
Digital Output A two-wire RS485 interface, Modbus RTU
Current Output

Two 0/4~20mA, Max. load 1000Ω, supports long-line calibration

Electronic clock Year/month/date, hour/minute/second
Historical Data

Historical data query and download

Last 100 calibration maintenance data
Language English
Display 128 x 64, 3.2-inch graphic dot matrix LCD
Calibration Method pH: 3 or 5 points; ORP: 2 points, offset
Protection Grade IP66
Enclosure Material Enhanced ABS
Dimension 144mm x 144mm x 120mm (Hole size 138mm x 138mm)
Power Supply AC: 100~240V 50/60Hz or DC:18~36V
Work Temperature 0~60, RH<95%, non-condensing
Storage Temperature -20~70, RH<55%, non-condensing
Installation Wall mounting, pipe clamp, panel mounting
Power Consumption Max. 5W