Brand: JUMO

JUMO 608003 Bimetal Dial Thermometer, Chemistry Version

Name: JUMO 608003 Chemistry Bimetal Dial Thermometer | Seven Star LLC
Brand: JUMO
SKU: 608003

Description

Bimetal dial thermometer with bayonet case for chemical and process plants

The JUMO 608003 is the chemistry version of the bimetal dial thermometer. It measures the temperature of liquids and gases and can be installed in pipelines, containers, machines and systems, including outdoors. The measuring system is a bimetal coil, so the pointer moves mechanically and no supply voltage is needed.

The case is stainless steel with a bayonet fastener in 1.4301 (304), the front pane is glass and the scale is polished aluminum with black labelling. Standard protection is IP65, which falls to IP54 when the drag indicator is fitted. The dial is read on a linear scale and the data sheet lists accuracy class 1.

A further feature is an Ex marking. The type carries ATEX and UKEX marking II 2 G Ex h IIC T6-T1 Gb and II 2 D Ex h IIIC T80°C-T450°C Db when extra code 601 (Ex h protection according to directive 2014/34/EU) is ordered. Certificates for approved device versions are available for download on the manufacturer website.

Pressure compensation (extra code 746) is a useful option where the case sits in an environment with large temperature swings, because it limits the build-up of pressure differences inside the sealed housing.

Technical specifications

Parameter	Specification
Type	608003; 608003/0110 and 1010 (100 mm), 608003/0116 and 1016 (160 mm)
Design types	Design 01 and design 10, each with 100 mm or 160 mm case
Measuring system	Bimetal coil; no auxiliary power
Accuracy	Class 1; linear scale, black labelling
Display ranges	-50 to +50 °C, -20 to +120 °C, 0 to 80, 100, 120, 160, 200, 250, 300 and 0 to 500 °C
Tolerance	+/-1.0 K to +/-5.0 K depending on the display range, stated for the narrower measuring range
Ex marking (code 601)	ATEX/UKEX II 2 G Ex h IIC T6-T1 Gb; II 2 D Ex h IIIC T80°C-T450°C Db
Protection type	IP65 (DIN EN 60529); IP54 with drag indicator
Case	Stainless steel 1.4301 (304) with bayonet fastener; glass pane; PC pane with drag indicator
Time constant	Approx. 20 s in moving water with a 10 mm stainless steel probe
Ambient temperature	Storage and transport -30 to +80 °C; no ambient temperature influence on the reading
Process connection	TA 01, TA 02, TA 03, TA 04, TA 06 and SH 04, SH 05, SH 07, SH 09; G 3/8, G 1/2, G 3/4, 1/2-14 NPT; CrNi 1.4571
Insertion length	100, 150 or 200 mm

Order code and extra codes

The order code consists of the basic type, display range, process connection, diameter, thread, process connection material, insertion length and extra code. An example from the data sheet is 608003/0110-810-010-10-104-26-100/000. Probe diameters of 6, 10, 12, 14 and 17 mm are available depending on the connection, and the details of each connection are described in data sheet 608730.

Extra codes include 409 (polished housing and front ring), 434 (drag indicator adjustable with a screwdriver and protected by a cover), 522 (customized scale), 601 (Ex h protection according to directive 2014/34/EU) and 746 (pressure compensation element). Specify all extra codes in sequence, separated by commas.

The 160 mm dial is the right choice when readings are taken from walkways or platforms, while the 100 mm case saves space on skids and small machines. The scale polished aluminum plate has black labelling and can be customized with extra code 522 if you want a specific unit, tag or marked operating band printed on the dial.

Check the table of display and measuring ranges before you choose the code. For example, a 0 to 250 °C display range has a stated measuring range of 30 to 220 °C with a tolerance of 2.5 K, and a 0 to 500 °C range uses 50 to 450 °C with 5.0 K. Operating inside the measuring range is what keeps the reading within the stated class.

Where it fits

The data sheet lists mechanical engineering, process industry, gear and gearbox construction, chemical plants and plant engineering. The bayonet case with a larger 160 mm option makes the dial easy to read on tall vessels and long pipe runs.

Because the reading is mechanical and insensitive to ambient temperature, it is a practical local indicator in zones where electronic indicators would need protection. If the application is in a hazardous area, confirm the zone, gas group and temperature class with the Ex marking before you order, and add extra code 601.

Typical installations are reactor jackets, solvent lines, heating loops, gearbox oil circuits and process skids. Ask for the process connection that matches your pipe or vessel, such as a weld-in tube (SH 09) for a fixed process line or a threaded tube (SH 04) for a service point.

The drag indicator option (extra code 434) records the highest temperature reached and is set with a screwdriver under a protective cover. Remember that fitting it changes the protection type from IP65 to IP54, so plan the location accordingly.

Documents and quotation

For engineering details, open the attached PDF (JUMO 608003 data sheet (EN, 7 pages)). When you are ready to buy, submit the order code and project requirements through the request form, and our team will confirm what can be supplied and when. Browse the category Temperature Instrumentation for alternatives.

Datasheets & Documents

Datasheet JUMO 608003 data sheet (EN, 7 pages) 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.