Product Overview

The HACH DPC1R2A is a digital combination pH and ORP sensor. It measures from 0 to 14 pH with excellent accuracy. This sensor uses a flat glass pH electrode for reliable readings. The HACH DPC1R2A features a rugged PPS body material. It withstands high temperatures and pressures in industrial processes. Users trust this sensor for water treatment and chemical monitoring applications.

Technical Specifications

The DPC1R2A delivers precise pH measurement under tough conditions. Below are the complete technical details.

Measurement Specifications

• Measurement Range: Covers 0 to 14 pH for full scale operation.

• Accuracy: Achieves 0.1 pH under reference conditions.

• Typical Application Range: Most pH applications fall between 2.5 and 12.5 pH.

• General Purpose Performance: Standard pH glass electrodes work well in this 2.5-12.5 range.

• Extreme pH Applications: Measurements below pH 2 or above pH 12 need special consideration.

• ORP Capability: Consult Hach technical support for ORP configuration details.

Material and Construction

• Body Material: PPS (Polyphenylene Sulfide) for excellent chemical resistance.

• Electrode Material: Flat glass pH electrode for durable sensing.

• Flat Glass Advantage: The flat surface resists coating and fouling.

• Sensor Thread Size: Standard 0.75 inch thread for easy installation.

Environmental Specifications

• Operating Temperature Range: Works from 0 to 105°C continuously.

• Pressure Rating: Handles 0 to 6.9 bar at 100°C.

• Pressure Rating (Imperial): Equivalent to 0 to 100 psig at 212°F.

• Temperature Compensation: Built-in Pt1000 ohm RTD for automatic corrections.

• Chemical Compatibility: PPS body resists many aggressive chemicals.

Cable and Transmission Specifications

• Sensor Cable Type: Integral coaxial cable for signal transmission.

• Cable Conductors: Includes two additional conductors for temperature compensation option.

• Standard Cable Length: 4.5 meters (15 feet) long permanently attached.

• Signal Transmission Distance: Reaches 1000 meters (3280 feet) maximum.

• Required Equipment for Long Distance: Use with Hach Digital Gateway, termination box, and sc100 Controller.

Digital Gateway Specifications

• Digital Gateway Function: Converts sensor signals for long distance transmission.

• Compatibility: Works seamlessly with sc100 series controllers.

• Extension Cable: Includes a 3 foot digital extension cable.

Installation Guide

Follow these steps to install the HACH DPC1R2A correctly.

1. Mount the Sensor: Screw the 0.75 inch thread into a compatible fitting or pipe tee.

2. Connect the Digital Gateway: Attach the sensor cable to the Hach Digital Gateway unit.

3. Run Extension Cable: Use the provided 3 ft digital extension cable to connect to the controller.

4. Wire to Controller: Connect the gateway output to an sc100 Controller or compatible device.

5. Apply Power: Power up the controller and digital gateway system.

6. Calibrate the Sensor: Perform a two-point or three-point pH calibration before use.

7. Verify Temperature Reading: Check that the Pt1000 RTD shows correct process temperature.

Installation Notes

• Mount the sensor vertically or at a 45-degree angle for best results.

• Avoid mounting near air bubbles or dead zones in the flow.

• Ensure the flat glass electrode faces the flow direction for self-cleaning.

Packaging List

This unit ships as a new and original product.

• HACH DPC1R2A Digital Combination pH/ORP Sensor with 15 ft cable

• Hach Digital Gateway unit

• 3 ft digital extension cable

• Product instruction manual

• Factory sealed packaging box

Frequently Asked Questions (FAQ)

1. How far can I locate the DPC1R2A sensor from my controller?
The HACH DPC1R2A transmits signals up to 1000 meters (3280 feet). You must use the Hach Digital Gateway, termination box, and sc100 Controller for this distance.

2. Does this sensor work for high temperature applications?
Yes, the DPC1R2A operates continuously at temperatures up to 105°C. The PPS body and flat glass electrode withstand this heat reliably.

3. What is the advantage of the flat glass pH electrode design?
The flat glass electrode resists fouling and coating. It also withstands abrasion better than bulb-style electrodes. This design suits dirty or slurry applications.

4. Can I use this sensor for ORP measurement instead of pH?
The HACH DPC1R2A is a combination pH/ORP sensor. Contact Hach Technical Support for ORP configuration details and electrode options.

5. What happens if I need to measure pH below 2 or above 12?
Standard pH glass electrodes may perform poorly below pH 2 or above pH 12. Consult Hach Technical Support for special electrode recommendations for extreme pH ranges.