Brand: JUMO

JUMO ecoTRANS Lf 03 DIN-Rail Conductivity Transmitter

Name: JUMO ecoTRANS Lf 03 Conductivity Transmitter | Seven Star LLC
Brand: JUMO
SKU: ecoTRANS Lf 03

Description

Conductivity and resistivity from pure water to concentrated brine, in a DIN-rail case

The JUMO ecoTRANS Lf 03 (type 202732) pairs with two-electrode conductivity cells of cell constant 0.01, 0.1, 1.0, 3.0 or 10.0 per cm and shows conductivity or resistivity in µS/cm, mS/cm, kΩ*cm, MΩ*cm, umho/cm or mmho/cm. The ranges run from 0 to 1 µS/cm up to 0 to 200 mS/cm, depending on the cell constant, so the same transmitter can serve reverse-osmosis permeate or a brine line. It adds a USP 645 switching function for pharmaceutical water, three temperature-compensation modes (natural water to EN 27888, ASTM D 1125-95 for high-purity water, or linear), a calibration timer and three-way isolation between input, output and supply. JUMO names freshwater and water treatment, reverse osmosis, ion exchangers, high-purity water, condensate, rinsing baths and cooling water as typical applications.

Technical specifications

Parameter	Specification
Type	202732 JUMO ecoTRANS Lf 03, conductivity/resistivity and temperature transmitter/switching device
Cell constants	0.01, 0.1, 1.0, 3.0 and 10.0 per cm (two-electrode); adjustable 20 to 500 %; lead compensation 0 to 99.99 Ω
Conductivity range	0 to 1 µS/cm up to 0 to 200 mS/cm according to cell constant, e.g. K = 0.01: 0 to 1, 2, 5, 20 µS/cm; K = 1: 0 to 500 µS/cm to 100 mS/cm; K = 10: 0 to 100 or 200 mS/cm
Deviation from characteristic	1 % to 2 % of range depending on range and cell constant (datasheet table)
Temperature input	Pt100/Pt1000 -10 to +250 °C; NTC 2 kΩ, NTC UUA 32J49, KTY 11-6 to 150 °C; custom NTC/PTC curve; 2-, 3- or 4-wire
Temperature compensation	Natural water EN 27888, ASTM D 1125-95, linear; coefficient 0 to 5.5 %/°C; reference 10 to 40 °C (25 °C default)
Analog outputs	Two isolated, freely scalable: 0(2) to 10 V (2 kΩ min.) or 0(4) to 20 mA (400 Ω max.); error ±0.015 mA or ±5 mV ±50 ppm/K
Switching output	One SPDT relay (8 A, 250 V AC/24 V DC) or two open collectors (100 mA, 35 V DC, drop 1.2 V max.)
Special functions	USP 645 alarm and pre-alarm, limit, pulse, delays, calibration timer, output simulation
Supply	20 to 30 V DC, ripple under 5 %, up to 3 W, SELV or PELV only
Environment	Ambient 0 to 50 °C; functional -10 to +60 °C; storage -20 to +75 °C; humidity up to 93 %, no condensation
Housing	PC on 35 mm x 7.5 mm DIN rail (EN 60715), IP20, approx. 150 g, any position
Resolution	14-bit A/D converter, 500 ms sampling, ambient error up to 0.5 % per 10 °C
Stock items	202732/888-888-101/000 (00441865); 202732/888-888-177/000 (00441866); 202732/888-888-101/024 (00441867)

Order code and accessories

Order code 202732/ output I – output II – output III / extra code. Output I (conductivity or resistivity) and output II (temperature) are both fixed at 888, a freely programmable analog output. Output III is 101 for one changeover relay or 177 for two open-collector outputs. Extra code 000 means none and 024 includes the PC setup software. The datasheet example is 202732/888-888-101/000. Stock items ship in three working days. Accessories are the setup software (00441961), a USB interface cable (00456352), a conductivity simulator (00300478, datasheet 202711) and a DIN-rail power supply type PS5R-A24 with 24 V DC, 0.3 A output (00374661). Cells must be chosen separately, and the cell constant must match the range you need: low constants for ultrapure water, high constants for high-conductivity liquids.

High-purity water and pharmaceutical duty

USP 645 defines on-line evaluation of Purified Water and Water for Injection by conductivity measured without temperature compensation, compared with a table of permitted conductivity at each temperature. When the function is active the configured contact switches as the standard requires, and a pre-alarm contact can warn at a chosen percentage of the table value. JUMO refers to its high-purity water publication FAS 614 for the background. The same transmitter handles resistivity displays for demineralised water and condensate polishing, and the setup program documents and copies configuration between units. In hot-climate utility plants it commonly sits in a marshalling cabinet near RO skids and boiler water panels. A field-mounted alternative is the published dTRANS CR 02. See the liquid analytical systems category for related cells and fittings.

An enquiry should give the cell constant of the sensor (0.01 to 10 per cm), the conductivity range, the medium temperature and the temperature sensor fitted to the cell. State whether conductivity or resistivity is displayed, whether temperature compensation follows natural water, ASTM or a linear coefficient, and whether a relay or two open-collector switching outputs are needed. For pharmaceutical water the USP 645 alarm and pre-alarm function is available. The module is a rail-mounted unit with 14-bit conversion and a 500 ms sampling time, powered from 20 to 30 V DC. The stock items listed cover relay output versions and one with an additional extra code.

The unit is also used as a resistivity monitor for ultrapure water and reverse osmosis permeate, where low cell constants such as 0.01 per cm give resolution in the sub-microsiemens range. Check the leads, because lead resistance compensation is part of the accuracy.

Documents and quotation

The hosted document is JUMO data sheet 202732 (7 pages, English). Confirm cell constant, output type and range against the datasheet table before ordering. Seven Star LLC is an independent supplier in Muscat; send the code and cell details for a quotation.

Datasheets & Documents

Datasheet JUMO ecoTRANS Lf 03 data sheet 202732 (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.