pH Sensor Transmitter– PH101
Industrial pH sensor transmitter for continuous water quality monitoring.
The PH101 pH sensor transmitter provides stable and accurate pH measurement for water and wastewater applications. Featuring a digital RS485 Modbus RTU output, it integrates easily with PLCs, controllers and VFD-controlled systems in treatment plants, pump stations and industrial processes.
Typical applications
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Drinking water and wastewater treatment plants
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Pump stations and process water systems
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Aquaculture and water quality monitoring
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Food & beverage processing
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Pharmaceutical and industrial water processes
Description
pH Sensor Transmitter for Water & Wastewater Applications
The PH101 pH Sensor Transmitter is a digital, industrial-grade sensor designed for reliable pH measurement in water and wastewater processes. It is commonly used in water treatment plants, wastewater facilities, aquaculture systems, and industrial process water applications, where stable and accurate pH monitoring is essential.
The sensor features a double salt bridge design and double-layer seepage interface, providing strong resistance to medium reverse osmosis and contamination. Its ceramic hole electrode structure reduces blockage risk, making it well suited for continuous and routine water quality monitoring.
Equipped with a high-strength glass bulb and large induction surface, the PH101 delivers stable pH readings even in challenging water conditions. The integrated digital electronics and RS485 Modbus RTU output ensure high noise immunity, long transmission distance, and easy integration into modern automation systems.
System integration
The PH101 pH sensor transmitter can be connected directly to PLCs, SCADA systems, controllers, and VFD-based process control systems, enabling closed-loop control of pumps, chemical dosing systems, and treatment processes.
Features
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Digital pH sensor transmitter for continuous water monitoring
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Double salt bridge design with double-layer seepage interface
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Resistant to medium reverse osmosis and electrode contamination
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Ceramic hole reference electrode, resistant to blockage
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Reinforced high-strength glass bulb for improved durability
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Extra-large sensing bulb for enhanced pH response
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RS485 Modbus RTU output for industrial communication
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Strong anti-interference capability and stable long-distance transmission
Specification
| Parameter | Specification |
|---|---|
| Measuring range | pH 2 – 12 |
| Output signal | RS485 (Modbus RTU) |
| Power supply | 9 – 36 V DC |
| Operating temperature | 0 – 80 °C |
| Temperature sensor | NTC (or customized) |
| Pressure range | 0 – 0.3 MPa |
| Membrane resistance | < 500 MΩ |
| Process connection | NPT 3/4″ |
| Sensor type | Digital pH sensor transmitter |
FAQ
What is the PH101 pH sensor transmitter used for?
The PH101 is used for continuous pH monitoring in water and wastewater applications, such as treatment plants, pump stations, process water systems, and industrial water circuits. It is designed for permanent installation and real-time measurement, not for laboratory sampling.
Is the PH101 suitable for wastewater applications?
Yes. The PH101 is designed for industrial water and wastewater environments. Its double salt bridge design and ceramic reference electrode provide strong resistance to contamination, clogging, and reverse osmosis effects commonly found in wastewater processes.
What communication protocol does the PH101 use?
The PH101 provides a digital RS485 output using the Modbus RTU protocol. This allows reliable integration with PLCs, SCADA systems, building automation systems, and industrial controllers over long distances with high noise immunity.
Can the PH101 be used with VFD-controlled systems?
Yes. The PH101 is commonly used in closed-loop control systems where pH measurement is combined with VFD-controlled pumps or dosing systems. This allows automatic adjustment of chemical dosing or process flow based on real-time pH values.
Does the PH101 include temperature measurement?
Yes. The sensor includes an integrated temperature sensor (NTC) for temperature compensation, ensuring accurate pH measurement across varying water temperatures. Custom temperature sensor options are available upon request.
What is the measuring range of the PH101?
The PH101 measures pH values in the range of pH 2 to pH 12, making it suitable for most drinking water, wastewater, industrial process water, and environmental monitoring applications.
Is the PH101 resistant to electrical interference?
Yes. The PH101 is a digital sensor with strong anti-interference capability. It uses low-noise signal cables and digital communication, ensuring stable measurement even in electrically noisy environments such as pump rooms and industrial plants.
What process connection does the PH101 use?
The PH101 is supplied with a standard NPT 3/4″ thread, allowing easy installation in pipes, tanks, or sensor holders commonly used in water treatment and industrial systems.
Is calibration required?
Like all pH sensors, periodic calibration is recommended to maintain measurement accuracy. Calibration intervals depend on water quality and operating conditions. For most applications, routine maintenance and calibration ensure long-term stable performance.
Is the PH101 suitable for continuous operation?
Yes. The PH101 is designed for continuous, long-term operation in industrial environments. Its robust electrode design and digital signal processing make it suitable for 24/7 monitoring in treatment plants and process systems.
Can LONGVISTA support system integration?
Yes. LONGVISTA supports customers with sensor selection, system integration advice, and application guidance, especially for VFD-based pump and process control systems in water and wastewater applications.
