Hach PD1P1 Analog Differential pH Sensor – Precision by Ubest Automation

• Brand & Model : Hach PD1P1 – a high-performance analog differential pH sensor.
• Measurement Range : Spans -2.0 to 14.0 pH, suitable for general purpose to wide-range applications.
• Accuracy & Repeatability : Delivers ±0.02 pH accuracy and ±0.05 pH repeatability for reliable readings.
• Temperature Compensation : Automatic via NTC 300 Ω thermistor; also supports manual fixed or pure water correction factors (ammonia, morpholine, or user-defined linear slope from 0.0 to 50 °C).
• Temperature Sensor : Integrated NTC 300 Ohm thermistor enables automatic compensation and accurate analyzer readout with ±0.5 °C accuracy.
• Drift Performance : Exhibits only 0.03 pH drift per 24 hours, non-cumulative, ensuring stable long-term operation.
• Operating Temperature : Functions reliably from -5 to 105 °C, handling a wide variety of process fluids.
• Pressure & Flow : Withstands up to 10.7 bar sensor-only pressure and handles flow rates up to 3 m/s (always verify mounting hardware ratings).
• Wetted Materials : Features a durable PEEK body with a titanium ground electrode for excellent chemical compatibility.
• Cable & Connection : Includes a 4.5 m 5-conductor cable with two isolated shields and XLPE jacket rated to 150 °C; analog connection with MODBUS communication.
• Mounting & Thread : Convertible mounting style with 1" NPT threads at both ends; dimensions: 34.9 mm diameter, 196.3 mm length.
• Weight : Lightweight at 0.9534 kg for easy installation.

Frequently Asked Questions (FAQ)

• What makes the Hach PD1P1 different from standard pH sensors? Its analog differential design with ±0.02 pH accuracy, wide temperature range (-5 to 105 °C), and automatic NTC 300 Ω compensation provide superior stability in demanding processes.
• Can I use this sensor for pure water applications? Yes, the PD1P1 includes selectable temperature correction factors for pure water, ammonia, morpholine, or user-defined linear slopes (0.0–50 °C).
• What communication protocol does it support? It uses MODBUS communication over the analog cable for seamless integration with control systems.
• How do I calibrate the Hach PD1P1? You can perform one or two-point calibration automatically or manually via the connected analyzer.
• Is the cable replaceable or permanently attached? The 4.5 m cable is factory-attached and designed for high-temperature environments up to 150 °C.
• What is the maximum pressure the sensor can handle? The sensor itself withstands up to 10.7 bar – always verify that your mounting hardware meets or exceeds this rating.
• Does Ubest Automation provide technical support? Absolutely, our team offers expert assistance for selection, installation, and troubleshooting.

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