JUMO dTRANS CR 02 Conductivity Transmitter Controller

Overview

JUMO dTRANS CR 02 is a compact multichannel transmitter and controller engineered for the measurement and control of electrolytic conductivity, specific electrical resistance, and TDS (total dissolved solids) value, with the additional ability to record temperature and standard input signals. Housed in an ultra-compact enclosure suitable for surface or control cabinet mounting, the JUMO dTRANS CR 02 combines a transmitter, controller, indicator, and data logger into a single device, supporting both conductive two-electrode and four-electrode measuring cells as well as a pulse generator for flow measurement.

As the official authorized partner and exclusive regional representative for JUMO, Seven Star LLC proudly supplies the JUMO dTRANS CR 02 to water treatment plants, utilities, and process industries across Oman and the GCC. Customers purchasing through Seven Star LLC receive full manufacturer warranty, genuine JUMO hardware, and technical support based in the Sultanate of Oman, eliminating the risk associated with grey-market imports of critical process instrumentation.

Measurement Principle

The JUMO dTRANS CR 02 determines electrolytic conductivity by applying an AC excitation signal across a conductivity sensor and measuring the resulting current, which is proportional to the ion concentration of the liquid being monitored. Both conductive two-electrode cells and four-electrode cells – the latter compensating for polarization and fouling effects in higher-conductivity media – can be connected directly, allowing the transmitter to cover applications ranging from ultra-pure water monitoring to concentrated process solutions. An integrated temperature input compensates the conductivity reading against a reference temperature, ensuring accurate, repeatable measurement independent of process temperature fluctuations.

Beyond conductivity, the device converts the raw signal into resistance or TDS units through built-in linearization, and a math and logic module allows derived values – such as blowdown control set points in cooling tower and boiler applications – to be calculated directly within the instrument. Because the measurement is purely electrical rather than mechanical, there are no moving parts to wear, no flow restriction introduced into the process line, and no risk of the sensor itself contaminating the measured medium, which makes the JUMO dTRANS CR 02 well suited to continuous, unattended operation in demanding industrial environments.

Engineering Design of the JUMO dTRANS CR 02

The JUMO dTRANS CR 02 is available in a 96 × 48 mm panel-mount enclosure (front rated IP65) or a surface-mounted IP67 housing, giving installers flexibility to fit the device into an existing control cabinet fascia or mount it directly at the process point. The front panel carries a clear plain-text display with a choice of large digits, bar graph, or trend visualization, and the device supports 13 integrated user languages for straightforward multilingual operation across regional plant teams.

Electrically, the unit provides one main input, one additional analog input, and two binary inputs as standard, with further inputs available via optional plug-in boards; up to three analog outputs and up to seven relays can be configured depending on slot selection, supporting cascaded control, alarm relays, and a wash timer for automated cleaning cycles. An RS422/485 interface is available for integration into a plant SCADA or building management system, and a calibration logbook is stored internally to support documented, traceable calibration records for regulated environments.

Key Features

The JUMO dTRANS CR 02 is built around a compact, feature-dense architecture that consolidates several instrumentation functions into a single field device. Key characteristics include:

• Ultra-compact housing that integrates a transmitter, controller, indicator, and data logger into one device, reducing panel space and wiring complexity.
• Support for both conductive two-electrode and four-electrode measuring cells, plus a pulse input for flow-proportional measurement.
• Choice of display visualization – large digits, bar graph, or trend display – for at-a-glance process monitoring.
• Integrated one-, two-, and three-point calibration routines with an internal calibration logbook for audit traceability.
• Up to three configurable analog outputs and up to seven relays across three optional expansion slots.
• Built-in math and logic module for derived calculations such as blowdown or dosing control.
• Dedicated wash timer function for automated cleaning of measuring cells in fouling-prone media.
• USP <645> switching function supporting pharmaceutical water conductivity requirements.

Industrial Applications

The JUMO dTRANS CR 02 is deployed across pure, ultra-pure, and pharmaceutical water systems, including applications governed by USP, Ph. Eur., and WFI standards, where four-electrode measuring cells combined with automatic measurement-range switching deliver the accuracy demanded by regulated water quality programs. In cooling tower and boiler feedwater applications, the device’s conductivity-based blowdown control reduces scaling and chemical consumption, while in cleaning-in-place (CIP) systems its wash timer function automates sensor cleaning cycles to maintain measurement accuracy over long unattended runs.

As the officially authorized partner for JUMO, Seven Star LLC distributes the JUMO dTRANS CR 02 to desalination plants, district cooling operators, pharmaceutical manufacturers, and utilities throughout Oman and the wider GCC, including facilities operating within the Sohar and Salalah economic zones. Regional customers benefit from local stock availability, calibration support, and direct access to JUMO’s engineering documentation through Seven Star LLC’s technical instrumentation division.

Technical Specifications

The table below summarizes the core technical specifications of the JUMO dTRANS CR 02 compact conductivity transmitter/controller.

Call To Action

Seven Star LLC supplies the JUMO dTRANS CR 02 conductivity transmitter/controller with full manufacturer warranty and regional technical support. Contact our instrumentation division for a formal RFQ, to check regional warehouse stock availability, or to download the complete technical datasheet for project specification. As the authorized partner for JUMO in Oman and the GCC, Seven Star LLC ensures every unit shipped is genuine, correctly configured, and backed by local calibration and after-sales support.