Brand: JUMO

JUMO ecoTRANS pH 03 DIN-Rail pH and Redox Transmitter

Name: JUMO ecoTRANS pH 03 pH Redox Transmitter | Seven Star LLC
Brand: JUMO
SKU: ecoTRANS pH 03

Description

A compact pH and redox transmitter that lives in the control cabinet

The JUMO ecoTRANS pH 03 (type 202723) is a 22.5 mm class DIN-rail transmitter and switching device for pH, redox voltage and temperature. It takes a combination electrode, a glass or metal electrode with a separate reference electrode (including isolated reference types) or an antimony electrode, and a Pt100 or Pt1000 for temperature compensation. It produces up to two galvanically isolated analog outputs and one changeover relay, and a 2-line LCD with front keys handles configuration; a PC setup program can save, print and clone the configuration to several units. Each device is delivered with a calibration certificate that documents its device and calibration data. The datasheet cites general water and wastewater, drinking and process water, surface water, seawater, swimming pools, well water and aquariums as typical uses.

Technical specifications

Parameter	Specification
Type	202723 JUMO ecoTRANS pH 03, transmitter/switching device for pH or redox and temperature
Input 1	pH or redox: combination electrode, glass or metal electrode with separate reference, antimony electrode; asymmetric and symmetric connection
Measuring range	-2 to 16 pH or -1500 to +1500 mV; accuracy 1 % of measuring range; 14-bit A/D, 500 ms sampling
Input 2 (temperature)	Pt100 or Pt1000, 2-wire, -10 to +150 °C (14 to 302 °F); offset correction -20 to +20 °C; accuracy up to 1.5 K
Analog outputs	Two freely configurable, isolated: 0(2) to 10 V (load 2 kΩ min.) or 0(4) to 20 mA (load 400 Ω max.); scaling at least 10 % of range; error up to 0.075 %
Relay output	One changeover (SPDT) contact, 8 A at 250 V AC or 8 A at 24 V DC resistive, more than 100,000 operations
Relay functions	Limit, window comparator, deviation alarm (wiper), delays, inversion, sensor error and calibration-timer signalling
Binary input	Potential-free contact to freeze the switch contact or input, output and display
Supply	20 to 30 V DC, ripple under 5 %, 4 W maximum; SELV or PELV circuits only
Operating conditions	Ambient 0 to 50 °C; functional -10 to +60 °C; storage -20 to +75 °C; humidity up to 75 %, no condensation
Housing	PC for 35 mm x 7.5 mm DIN rail (EN 60715); IP20; approx. 150 g; any mounting position
Standards	Electrical safety EN 61010 (overvoltage category II, pollution degree 2); EMC to EN 61326 (class B emission)
Connections	Screw terminals up to 2.5 mm2
Stock versions	202723/888-000-000/000 (00508665); 202723/888-888-101/000 (00508663); 202723/888-888-101/024 with setup software (00508664)

Order code and options

The code is 202723/ output I – output II – output III / extra code. Output I, for pH or redox, is always 888, a freely programmable analog output. Output II, temperature, is either 000 (none) or 888 (analog). Output III is either 000 or 101, one changeover relay. Extra code 000 is none and 024 includes the PC setup software. The datasheet example is 202723/888-888-101/024. Stock versions ship in three working days: the pH-only unit with one analog output (part 20/00508665), the unit with two analog outputs and one relay (20/00508663) and the same with software (20/00508664). Accessories include the setup software (20/00513893), a USB interface cable (70/00456352), a pH simulator and its connection cable, and a DIN-rail switching power supply of type PS5R-A24 (20/00374661). One printed datasheet detail to note: the sheet is dated 2008, so operating-system notes for the PC software are historical and should be confirmed with the manufacturer.

Using it in a plant

Because the transmitter carries no display housing for field use, it belongs in a cabinet with the electrode cable kept short and screened; the datasheet shows reference and glass-electrode terminals plus a liquid-potential terminal that is used only in symmetric connection. A typical loop is a dosing-pump controller that reads the isolated analog output, with the relay used for a high or low pH alarm window. Typical Gulf applications include neutralisation of cooling-tower blowdown, desalination post-treatment, swimming-pool dosing and effluent monitoring. For an integrated field unit with display see the published dTRANS pH 02, and for matching electrodes the JUMO pH glass electrode. Related equipment sits in the liquid analytical systems category.

For an enquiry please state whether the loop measures pH or redox, which electrode types are installed, how long the cable runs, and whether the temperature compensation is done with a Pt100 or Pt1000 two-wire probe. Mention the required output signal and the alarm logic wanted on the relay, such as a limit, a window or a deviation alarm. The module is powered from 20 to 30 V DC in a SELV or PELV circuit and weighs about 150 g and snaps onto a 35 mm rail. Three stock versions exist, and extra code 024 adds the PC setup software.

Documents and quotation

The hosted document is JUMO data sheet 20.2723 (7 pages, English, dated 2008-08-20). Verify current availability and options with the manufacturer before ordering. Seven Star LLC is an independent supplier in Muscat; send the order code and electrode type for a quotation.

Datasheets & Documents

Datasheet JUMO ecoTRANS pH 03 data sheet 202723 (EN) Download

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About brand

JUMO is the German maker of temperature sensors, process controllers, pressure transmitters and liquid analysis instruments. Moritz Kurt Juchheim founded it in Fulda in 1948 as M. K. Juchheim KG, making glass thermometers with six employees. The name JUMO comes from the founder's name. It is still a family company headquartered in Fulda, and the parent company has been called JUMO GmbH & Co. KG since 2003.

Seven Star LLC is an independent supplier in Muscat. We list JUMO RTD and thermocouple probes, thermowells, transmitters, controllers, recorders and water analysis instruments, and supply them to process plants, OEMs, HVAC contractors and water utilities in Oman and the GCC by type number.

JUMO company profile

Established	1948, Fulda, Germany, by Moritz Kurt Juchheim
First products	Glass and contact thermometers; platinum glass sensors from 1966
Ownership	Family-owned; renamed JUMO GmbH & Co. KG in 2003
Product families	RTD and thermocouple probes, thermowells, temperature and pressure transmitters, controllers and thermostats, safety temperature limiters, paperless recorders, liquid analysis and flow and level instruments

Milestones

1948: Moritz Kurt Juchheim founds M. K. Juchheim KG in Fulda, making glass thermometers with six employees.
1966: Platinum glass temperature sensors are added.
2003: The parent company is renamed JUMO GmbH & Co. KG.

JUMO products we list

Family	Models	Typical use
RTD and thermocouple probes	902020, 902030, 902050, 902120, 902006 2xPt100, PROCESStemp, mineral-insulated RTD, 901020 thermocouple, 901210, 902810 hygienic, 902550 surface, 902520 HVAC, MarineTemp	Temperature measurement in pipes, vessels, machines, HVAC and food plants
Thermowells and inserts	909710 thermowells, 909740 measuring inserts	Protecting sensors and replacing them without opening the process
Temperature transmitters	dTRANS T01, T03, T04, T05, T06 SIL, T07 HART, T09, T1000 IO-Link, DELOS T switch	Converting sensor signals to 4-20 mA, HART or IO-Link
Pressure and level	dTRANS p20, p30, p31 hygienic, p33 Ex, p02 DELTA, MIDAS S05, MIDAS DP10, DELOS S02, MAERA S25, NESOS R20	Pressure in process, hydraulic and OEM systems; tank and well level
Controllers, limiters and recorders	DICON touch, IMAGO 500, dTRON 316, iTRON, cTRON, diraTRON 104, eTRON T, safetyM STB/STW, safetyM TB/TW, LOGOSCREEN 601, mTRON T	Furnace, oven and process control, over-temperature protection and recording
Liquid analysis and flow	AQUIS touch S, AQUIS touch P, AQUIS 500 pH, AQUIS 500 CR, dTRANS pH 02, pH electrode, digiLine DO, ecoLine NTU, flowTRANS MAG H20, flowTRANS US W01	pH, conductivity, oxygen and turbidity in water treatment; liquid flow

Choosing a temperature sensor starts with the range and accuracy. A Pt100 RTD is accurate and stable from about -200 to 600 °C and is the usual choice in process plants. A thermocouple (type K or J, for example) covers much higher temperatures and responds faster but is less accurate. The wiring also matters: a 3-wire or 4-wire Pt100 connection cancels the resistance of the cable, while a 2-wire connection adds an error that grows with cable length. That is why a head-mounted transmitter is often fitted close to the sensor.

Where JUMO products are used

In Oman and the GCC, JUMO sensors and controllers are used in oil and gas and chemical plants, food and beverage production, plastics and metal heat treatment, HVAC and district cooling, water and wastewater treatment, swimming pools and marine applications.

Ordering JUMO products: what we need

Send the JUMO type number and the full order code from the label (for example 902020/10-...). For probes, add the sensor type (Pt100, Pt1000, type K or J), the number of wires, the insertion length and diameter, and the process connection. For controllers, add the input, outputs and supply voltage.

Facts checked against JUMO's company history, October 2026.

Browse JUMO products by category: Temperature Instrumentation, Pressure Instrumentation, Liquid Analysis Sensors, Controllers & Data Acquisition, Level Transmitter.