Analytical Instruments
pH / ORP TRANSMITTER
pH 100S
PH-100S pH / ORP Transmitter is a two-wire, loop-powered transmitter designed for accurate online pH and ORP measurement in industrial and process applications. It accepts input from any make of pH or ORP electrode and converts the signal into a stable 4–20 mA output with optional HART (Generic) communication. Real-time measurement is displayed on a clear LCD interface, enabling easy on-site monitoring and calibration. The transmitter supports auto or manual temperature compensation using RTD PT-100 / PT-1000 to ensure reliable readings under varying process conditions. With high accuracy (±0.05 pH / ±3 mV ORP), fast response, and low power consumption, PH-100S delivers consistent performance. Available in weatherproof IP-67 or CMRI IIA/IIB flameproof enclosures, it is well suited for water treatment, chemical, pharmaceutical, and industrial process monitoring.
Configure the transmitter and electronics based on application, environment, and compliance requirements.
| Type of Input | From pH / ORP Electrode (Compatible to any make Electrode) |
| Display | LCD Display |
| Type of Output | 4 - 20 mA, 4 - 20 mA with HART (Generic) |
| Calibration Range | pH : 0 to 14 pH, ORP : +/-2000mV |
| Calibration Method | 3 Point buffer |
| Temperature Compensation | RTD PT-100 / RTD PT-1000 |
| Electronics Transmitter Accuracy | pH : +/- 0.05 pH, ORP : +/-3mV |
| Isolation | 1.4 KV between Input, Output & Power Supply |
| Sensor Connection | 1) Through BNC connector 2) Through Terminals |
| Power Supply | 24V DC Two Wire Loop Powered |
| Repeatability | +/-0.05% of SPAN, at 25 °C |
| Temperature Coefficient | +/- 0.05% per °C |
| Dimensions | 155 mm (H) x 105 mm (W) X 130 mm (D) |
| Electrical Connections | 1) M20X1.5 (F) 2) ½” NPT(F) |
| Electronic Protection Class | Flame Proof CMRI IIA IIB / Weather Proof IP-67 |
| Mounting | 2” Pipe Mounting |
| Weight | 1 kg (Approximate) |
| Housing | Temperature -20 to 70 °C / Humidity 5 to 95% non condensing |
| Ambient Conditions | Cast aluminium with epoxy coating NEMA 4X / S S316 |
| Flow Through Assembly (Optional) | SS 316 / PP |
Download the complete product catalogue for detailed specifications, dimensions, certifications, and application guidance.
Electronet instruments are widely deployed across multiple industries and utilities for reliable monitoring and control of critical process parameters.
| Industry | Key Applications |
| Water & Wastewater | Monitoring pH and ORP in treatment plants, pipelines, and effluent systems |
| Chemical & Petrochemical | pH/ORP measurement for process control, neutralization, and reaction monitoring |
| Power Generation | pH monitoring in boiler feedwater, condensate, and cooling water systems |
| Food & Beverage | Monitoring pH in production lines, process water, and cleaning-in-place (CIP) systems |
| Pharmaceuticals & Biotechnology | pH/ORP monitoring in bioreactors, formulation, and process control systems |
| Pulp & Paper Industry | Monitoring pH in pulping, bleaching, and effluent treatment processes |
| Marine & Shipbuilding | pH/ORP measurement in ballast water, cooling systems, and environmental monitoring |
| Metals & Mining | Monitoring pH in process water, slurry, and chemical dosing systems |
| HVAC & Building Automation | pH monitoring in cooling towers and water distribution systems |
| Environmental Monitoring | Continuous pH/ORP measurement in rivers, lakes, and industrial effluent streams |
Core capabilities and advantages of the product.
CONDUCTIVITY / TDS TRANSMITTER
TOROIDAL CONDUCTIVITY / TDS TRANSMITTER
DISSOLVED OXYGEN TRANSMITTER
CONDUCTIVITY TRANSMITTER - SWITCH
TOROIDAL CONDUCTIVITY TRANSMITTER - SWITCH
DISSOLVED OXYGEN TRANSMITTER - SWITCH
OXIDATION-REDUCTION POTENTIAL TRANSMITTER - SWITCH
pH TRANSMITTER - SWITCH
pH/ORP TRANSMITTER - SWITCH
UNIVERSAL ANALYTICAL CONTROLLER
CONDUCTIVITY SENSOR
TOROIDAL CONDUCTIVITY SENSOR
ORP SENSOR
DO Sensor