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Seeed Studio S-pH-01A V2.0 pH sensor probe with cable, IP68 electrode IP65 transmitter

Seeed Studio

Seeed Studio S-pH-01A pH Sensor V2.0 MODBUS-RTU RS485 0-2V Analog 3.6-30V IP65 IP68

SKU CH-9NKP-8HHEV MPN S-pH-01A

Industrial pH sensor measures water acidity with MODBUS-RTU RS485 and 0~2V analog output, powered from 3.6 to 30V, electrode rated IP68 and transmitter IP65 for long immersion

  • Product typeSensors
  • High accuracy and fast response for reliable readings
  • MODBUS-RTU RS485 plus 0~2V analog output for flexible integration
  • Powered from 3.6V to 30V for wide supply compatibility
  • IP68 electrode and IP65 transmitter withstand long immersion
  • Anti-clogging junction reduces maintenance needs

Industrial pH Sensor V2.0

The Seeed Studio S-pH-01A measures hydrogen-ion activity in water-based solutions for soil monitoring and water quality applications. It provides both MODBUS-RTU RS485 and 0~2V Analog Voltage outputs for integration with data loggers and displays. The electrode carries an IP68 rating while the transmitter is rated IP65 for waterproof performance.

Dual Output and Wide Power Range

This sensor replaces single-protocol probes by offering simultaneous serial and analog interfaces. The 3.6V to 30V supply range allows direct connection to varied industrial power sources without extra regulation. The solid dielectric and large-area PTFE liquid junction resist clogging for maintenance-free long-term immersion.

Installation Compatibility Checks

Verify that your controller or logger supports MODBUS-RTU over RS485 or accepts a 0~2V analog input signal. Confirm the available supply voltage falls within the 3.6V to 30V window. Ensure the mounting environment matches the IP65 and IP68 sealing ratings for continuous submersion or soil burial.

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Price $203.99
Pricier than about 78% of the 255 comparable items (median $39.99).

Specifications

Product
Product typeSensors

Questions about this item

What mounting considerations apply for the IP68-rated electrode and IP65-rated transmitter?

The electrode carries IP68 protection for full immersion while the transmitter is IP65 rated for splash resistance. Both must be sealed tightly during installation to maintain their waterproof integrity in soil or water.

How do I wire the MODBUS-RTU RS485 and 0-2V analog outputs, and what common wiring mistake should I avoid?

Connect the hook-up wires to a 3.6-30V supply, then link RS485 A/B lines for MODBUS-RTU or use the 0-2V analog output. A frequent error is reversing the RS485 polarity which prevents communication.

What ongoing maintenance does the sensor require given its anti-clogging junction design?

The sensor features a maintenance-free junction that resists clogging. If white granular crystals appear around the probe shroud, this is normal and can be rinsed off without affecting performance.

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