SMR04-3 pH Probe Analyzer for water Quality (RS485)

pH Analyzer is connected directly via RS485 communication interface, providing simple, reliable, cost- saving process data with remote monitoring, calibration, configuration and diagnostics capabilities. Housing in a robust IP68 proof enclosure, 1000 N tensile strength cable, up to 1.2 km digital data transmission, the pH Meter is ideally used in water/wastewater industry.

■ Robust IP68 Water Submersible Enclosure, Solution Without Cabinet
■ 1 sec On-line Realtime Measurement
■ 0.05 W Ultra Low Power Consumption, Ideal for Outdoor Applications
■ Temperature Compensation
■ High Reliability, Drift Free
■ Lightening and Surge Protection for Power and RS485 Communication
■ 1.2 Km RS485 Digital Communication, Minimize Cabling and Engineering Cost
■ Software Configuration Calibration and Data Monitoring
■ Standard Modbus RTU Protocol, Direct Connected with PLC, HMI, Eliminate I/O Module Cost

SMR04 Ph Analyzer:
• Measuring range: 0 ~ 14 pH; 2 ~ 11 pH (plastic sensor)
• Accuracy: ± 1% FS or ± 0.1 pH
• Resolution: 0.01 pH
• Repeatability: ± 0.02 pH
• Operating pressure max. 3 Kgf / cm2; Max. 10 Kgf / cm2 (optional)
• Operating temperature 0 ~ 85 ° C; 0 ~ 100 ° C (optional)
• Process flow rate 0.1 l / min
• Response Time 1 sec.
• Protection IP68
• Pt100 temperature sensor
• Temperature measuring range 0 ~ 85 ° C; 0 ~ 100 ° C (optional)
• Temperature accuracy ± 0.5 ° C
• Process connection M26x1.5
• Sensor material Glass; Plastic (optional)
• Housing material POM
• Dimension Φ 40 Χ 360 mm
• Weight: approx. 150 g; Cable: 80 g/m

General
• Output Signal: RS485 (Modbus RTU protocol); 4~20 mA(Optional)
• Data Resolution: 16 bits (0.001% FS)
• Surge Protection: 4000 V DC
• Power: 3.6~12 V DC ±10%, 20 mA
• Protection: polarity, overload, short circuit, lightening
• Safety: CE, FCC

Measurement Method
The sensing device consists of a pH electrode, a signal amplifier, and a reference electrode.
The pH sensing electrode acts as a transducer that generates and transmits different levels of voltage based on the concentrations of free hydrogen ions in water. The amplifier increases the signal so that it can be measured. The isolated reference electrode produces a baseline signal that is compared to the response from the active plt electrode, generating a pH unit measurement.

Typical Application: