High-Pressure Alkali pH Electrode – 130°C, 13 bar
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The InstroDirect IDH-J605-HP High-Pressure Alkali pH Electrode – 130°C, 13 bar — is a high-pressure, high-temperature alkali-stable pH electrode rated for 13 bar process pressure and 130 °C continuous operation across the full 0–14 pH range. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
The InstroDirect IDH-J605-HP High-Pressure Alkali pH Electrode – 130°C, 13 bar — is a high-pressure, high-temperature alkali-stable pH electrode rated for 13 bar process pressure and 130 °C continuous operation across the full 0–14 pH range. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
Cryogenic Process pH Sensor – −20°C Low-Temperature
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The InstroDirect IDH-J301-CR Cryogenic Process pH Sensor – −20°C Low-Temperature — is a specialised cryogenic pH electrode rated for continuous operation down to −20 °C. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
The InstroDirect IDH-J301-CR Cryogenic Process pH Sensor – −20°C Low-Temperature — is a specialised cryogenic pH electrode rated for continuous operation down to −20 °C. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
Viscous Liquid pH Probe – Anti-Clogging
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The InstroDirect IDH-J204-V Viscous Liquid pH Probe – Anti-Clogging — is a specialised pH electrode engineered for viscous process liquids — honey, syrups, slurries, thick emulsions, and semi-solid food products — where standard electrodes clog within hours. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
The InstroDirect IDH-J204-V Viscous Liquid pH Probe – Anti-Clogging — is a specialised pH electrode engineered for viscous process liquids — honey, syrups, slurries, thick emulsions, and semi-solid food products — where standard electrodes clog within hours. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
Corrosion/Fouling-Proof Process pH Electrode – 130°C
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The InstroDirect IDH-J203-CF Corrosion/Fouling-Proof Process pH Electrode – 130°C — is a heavy-duty pH electrode engineered for processes that foul or corrode standard electrodes within weeks — high-solids wastewater, oil-bearing process water, and sulphide-rich chemistries. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
The InstroDirect IDH-J203-CF Corrosion/Fouling-Proof Process pH Electrode – 130°C — is a heavy-duty pH electrode engineered for processes that foul or corrode standard electrodes within weeks — high-solids wastewater, oil-bearing process water, and sulphide-rich chemistries. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
HF-Resistant pH Electrode – Hydrofluoric Acid Proof
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The InstroDirect IDH-J202-HF HF-Resistant pH Electrode – Hydrofluoric Acid Proof — is a specialised HF-resistant pH electrode designed for processes containing hydrofluoric acid that destroys standard glass electrodes within hours. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
The InstroDirect IDH-J202-HF HF-Resistant pH Electrode – Hydrofluoric Acid Proof — is a specialised HF-resistant pH electrode designed for processes containing hydrofluoric acid that destroys standard glass electrodes within hours. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
Digital Process pH Sensor Pro – RS485 Modbus
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The InstroDirect IDH-100P Digital Process pH Sensor Pro – RS485 Modbus — is the digital "Pro" variant with an integrated in-sensor transmitter and RS485 Modbus RTU output. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
The InstroDirect IDH-100P Digital Process pH Sensor Pro – RS485 Modbus — is the digital "Pro" variant with an integrated in-sensor transmitter and RS485 Modbus RTU output. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
Industrial Standard pH Electrode – 130°C, 10 bar
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The InstroDirect IDH-J201 Industrial Standard pH Electrode – 130°C, 10 bar — is a robust general-purpose industrial pH electrode rated for continuous 130 °C operation and 10 bar pressure. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
The InstroDirect IDH-J201 Industrial Standard pH Electrode – 130°C, 10 bar — is a robust general-purpose industrial pH electrode rated for continuous 130 °C operation and 10 bar pressure. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
High-End Industrial pH Sensor – PEEK Body, Extreme Chemistry
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The InstroDirect IDH-500T High-End Industrial pH Sensor – PEEK Body, Extreme Chemistry — is an all-PEEK bodied industrial pH sensor engineered for extreme chemistry applications — strong acids, caustics, solvents, semiconductor process water, and pharma ultra-pure water where stainless steel is corroded and standard glass electrodes fail within weeks. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
The InstroDirect IDH-500T High-End Industrial pH Sensor – PEEK Body, Extreme Chemistry — is an all-PEEK bodied industrial pH sensor engineered for extreme chemistry applications — strong acids, caustics, solvents, semiconductor process water, and pharma ultra-pure water where stainless steel is corroded and standard glass electrodes fail within weeks. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
Premium Industrial pH Sensor – Long-Life Reference
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The InstroDirect IDH-350T Premium Industrial pH Sensor – Long-Life Reference — is a premium-grade industrial pH electrode designed for maximum service life in demanding process applications. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
The InstroDirect IDH-350T Premium Industrial pH Sensor – Long-Life Reference — is a premium-grade industrial pH electrode designed for maximum service life in demanding process applications. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
Industrial pH Sensor – CIP-Compatible, Extended Temperature
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The InstroDirect IDH-320T Industrial pH Sensor – CIP-Compatible, Extended Temperature — is an industrial pH sensor rated for short-duration CIP / SIP exposure up to 110 °C with rapid recovery to normal process temperature. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
The InstroDirect IDH-320T Industrial pH Sensor – CIP-Compatible, Extended Temperature — is an industrial pH sensor rated for short-duration CIP / SIP exposure up to 110 °C with rapid recovery to normal process temperature. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
Industrial Process pH Sensor – 100°C, 316 SS Trim
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The InstroDirect IDH-300T Industrial Process pH Sensor – 100°C, 316 SS Trim — is a heavy-duty industrial pH sensor rated for continuous operation at 100 °C and 10 bar, designed for demanding process applications such as cooling towers, boiler water, acid/caustic dosing, and petrochemical process water. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
The InstroDirect IDH-300T Industrial Process pH Sensor – 100°C, 316 SS Trim — is a heavy-duty industrial pH sensor rated for continuous operation at 100 °C and 10 bar, designed for demanding process applications such as cooling towers, boiler water, acid/caustic dosing, and petrochemical process water. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
Mid-Range Industrial pH Sensor – 12mm Extended Body
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The InstroDirect IDH-200T Mid-Range Industrial pH Sensor – 12mm Extended Body — is an extended-body industrial pH electrode with 316 stainless trim, designed for deeper-insertion installations in process tanks and WWTP return lines where a short compact probe would sit too close to the pipe wall. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
The InstroDirect IDH-200T Mid-Range Industrial pH Sensor – 12mm Extended Body — is an extended-body industrial pH electrode with 316 stainless trim, designed for deeper-insertion installations in process tanks and WWTP return lines where a short compact probe would sit too close to the pipe wall. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
Compact Process pH Sensor – 12mm Body
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The InstroDirect IDH-100T Compact Process pH Sensor – 12mm Body — is a compact 12mm-body industrial pH electrode designed for general process water, cooling tower, and wastewater monitoring. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.
The InstroDirect IDH-100T Compact Process pH Sensor – 12mm Body — is a compact 12mm-body industrial pH electrode designed for general process water, cooling tower, and wastewater monitoring. Australian technical support, on-site calibration, open RS485 Modbus compatibility. Alternative to Endress+Hauser and HACH pH sensors.