Product Overview

The HACH DRC2K5N delivers reliable ORP measurements across a wide -2000 to 2000 mV range. A platinum electrode provides the sensing element. The PVDF body offers excellent chemical resistance. This sensor operates at temperatures from 0 to 105°C. Pressure tolerance reaches 6.9 bar at 100°C. Consequently, the HACH DRC2K5N suits demanding industrial environments. The integral coaxial cable measures 4.5 meters (15 feet) long. Two additional conductors support an optional temperature compensator. For long-distance installations, signal transmission reaches 1000 meters when used with Hach Digital Gateway and sc100 Controller.

Technical Specifications

General Specifications

Materials of Construction

The HACH DRC2K5N uses PVDF for the sensor body. A platinum electrode serves as the sensing surface. The double junction uses PTFE material. All O-rings are FKM/FPM. Every wetted component resists corrosion from aggressive process streams. For this reason, the sensor works well in chemical and wastewater applications.

Environmental & Process Conditions

Operating temperature spans 0 to 105°C. Pressure rating reaches 6.9 bar at 100°C. The HACH DRC2K5N handles both low and high temperature processes. Pressure fluctuations do not easily damage the PVDF body. However, always verify compatibility with your specific chemical environment.

Signal Transmission

The integral coaxial cable provides 4.5 meters of length. Two extra conductors allow connection of a temperature compensator if needed. For longer runs, use the Hach Digital Gateway and sc100 Controller. Signal transmission then extends to 1000 meters (3280 feet). As a result, you can place the controller far from the measurement point.

pH Application Note

Most pH applications fall in the 2.5 to 12.5 pH range. General purpose pH glass electrodes perform well within this range. However, some industrial processes require pH measurements below 2 or above 12. For these extreme pH applications, consult Hach Technical Support. The HACH DRC2K5N focuses on ORP measurement rather than low/high pH.

Key Features & Benefits

Wide ORP Range

The HACH DRC2K5N measures from -2000 to +2000 mV. This wide span covers virtually all oxidation-reduction potential applications. Examples include disinfection monitoring, chromium reduction, and cyanide oxidation.

Robust PVDF Construction

PVDF material resists many aggressive chemicals. It also withstands high temperatures and pressures. Therefore, the HACH DRC2K5N survives harsh industrial environments. Long service life reduces replacement frequency.

Platinum Electrode

A platinum electrode provides excellent ORP response. This noble metal does not easily oxidize or contaminate. Accordingly, measurements remain stable over extended periods.

Long Transmission Distance

Signal transmission reaches 1000 meters with proper equipment. The Hach Digital Gateway and sc100 Controller enable this distance. Centralized control becomes possible even with remote sensors.

Easy Installation

The 0.75-inch sensor thread matches standard fittings. Integral cable simplifies wiring. No external signal amplifier is required for the HACH DRC2K5N.

Installation Guidelines

Follow these steps for proper installation of the HACH DRC2K5N.

1. Select a suitable mounting location with representative process flow.

2. Install the sensor using the 0.75-inch thread into a standard fitting.

3. Route the integral cable away from high-voltage power lines.

4. Connect the coaxial signal wires to the Digital Gateway or sc100 Controller.

5. Connect the two optional conductors if using a temperature compensator.

6. Calibrate the sensor using standard ORP calibration solutions.

7. Verify measurement accuracy after installation before process startup.

Note: The HACH DRC2K5N provides no built-in temperature compensation. For temperature-dependent applications, use a separate temperature sensor or compensator option.

Packaging List

• One HACH DRC2K5N Digital Combination pH/ORP Sensor

• One integral coaxial cable (4.5 meters attached)

• One product quick start guide

• One protective storage cap

Common FAQs

1. What is the difference between the HACH DRC2K5N and a standard pH sensor?

The HACH DRC2K5N measures ORP (oxidation-reduction potential) in millivolts, not pH. Standard pH sensors measure hydrogen ion activity. This sensor uses a platinum electrode instead of a pH-sensitive glass membrane.

2. Does the HACH DRC2K5N require temperature compensation?

No, the HACH DRC2K5N does not include temperature compensation. ORP measurements have minimal temperature dependence compared to pH. However, the cable includes two conductors for an optional separate temperature compensator if your application requires it.

3. How far can I install the HACH DRC2K5N from my controller?

The integral cable provides 4.5 meters of direct connection. For longer distances, use the Hach Digital Gateway, Termination Box, and sc100 Controller. Signal transmission then reaches 1000 meters (3280 feet). Consequently, remote mounting presents no problem.

4. What wetted materials does the HACH DRC2K5N use?

All wetted parts include PVDF body, PTFE double junction, glass with platinum electrode, and FKM/FPM O-rings. Therefore, this sensor resists many corrosive chemicals. Always check compatibility with your specific process fluid before installation.

5. Can I use the HACH DRC2K5N for pH measurements below 2 or above 12?

The sensor itself measures ORP, not pH. For extreme pH applications, consult Hach Technical Support. General purpose pH electrodes typically work well from 2.5 to 12.5 pH. The HACH DRC2K5N focuses on ORP measurement exclusively.

Why Choose This Sensor?

The HACH DRC2K5N delivers reliable ORP measurement across a wide -2000 to 2000 mV range. PVDF construction withstands harsh chemicals and high temperatures. The platinum electrode provides stable, repeatable readings. Long transmission distance enables flexible installation locations. For wastewater treatment, chemical processing, or disinfection monitoring, this sensor performs reliably. Choose the HACH DRC2K5N for demanding ORP applications.