Brand: JUMO

JUMO PINOS L02 Calorimetric Flow Sensor and Flow Switch for Liquids, Type 406041

Name: JUMO PINOS L02 Calorimetric Flow Sensor | Seven Star LLC
Brand: JUMO
SKU: PINOS L02

Description

A flow switch and flow sensor with no moving parts for pumps, cooling circuits and lubrication lines

The JUMO PINOS L02 (type 406041) measures and monitors the flow velocity of liquid media using the calorimetric principle: a heating element is cooled by the passing liquid, and the higher the velocity the more heat is carried away from the temperature probe. With no moving parts to disturb the flow profile, the sensor reports an admissible flow range of 0 to 300 cm/s at nominal pressure up to 75 bar. It can output a 4 to 20 mA signal, a PNP switching output or both, and either output can be set to flow velocity or medium temperature. JUMO names cooling water circuits, pumps, heat exchangers, lubrication circuits, leakage monitoring on process lines and dry-run protection for pumps as the main uses.

Technical specifications

Parameter	Specification
Measuring principle	Calorimetric; heated element cooled by the flowing liquid; no moving parts
Flow velocity range	0 to 300 cm/s; default scaling 0 to 150 cm/s for water
Repeatability / accuracy	Plus or minus 2 % and plus or minus 8 % of range end value (reference conditions, default settings)
Temperature drift	Plus or minus 0.2 % per K of range end value
Response time	4 to 10 s to a flow change
Analog output	4 to 20 mA three-wire, settable 0 to 20, 4 to 20, 20 to 0 or 20 to 4 mA; error 0, 3.4 or 22 mA; attenuation 0 to 99 s
Switching output	PNP high-side; N/O, N/C, window opening or window closing; default switch point 50 % (75 cm/s water), release 40 %; delay 0 to 99 s
Output assignment	Analog and switching outputs can each follow flow velocity or medium temperature
Supply	DC 24 V plus or minus 10 %, SELV; current up to 200 mA (analog) or 400 mA (switching)
Nominal / burst pressure	PN 75; burst 200 bar
Medium temperature	-25 to +90 degC, liquids, no abrasive media
Ambient / storage temperature	-25 to +70 degC on housing; -25 to +80 degC
Protection	IP65/67 with protective lid and viewing window
Materials	Wetted 316L and 316 Ti (1.4404, 1.4571) with FPM (Viton) seal; housing PA66-GF30
Weight	Approx. 100 g depending on probe length
EMC	DIN EN 61326-1; emission class A, only for industrial use; industrial immunity
Setup	Micro USB socket (configuration only, powered without auxiliary energy); push-button for switch point and calibration; 3 LEDs
Output codes	406 4 to 20 mA three-wire; 470 one PNP switching output; 475 PNP plus 4 to 20 mA
Nominal width codes	0020 DN 20 to 0050 DN 50; 6530 additional widths (on-site calibration version only)
Process connection	182 union nut M18 x 1.5 (DIN EN ISO 8434-1)
Sensor length / version	37, 51 or 65 mm; 88 factory calibration; 99 on-site calibration
Order example	406041/000-406-0050-182-51-88/100

Fittings and sensor length

Choose the sensor length to suit the pipe. The datasheet carries an installation recommendation table by nominal width and fitting type with probe lengths of 37, 51 and 65 mm, in which the longest 65 mm probe is shown for DN 50, and 51 mm is given for additional nominal widths. Stainless steel welded sockets M18 x 1.5 for 316L pipe are listed in part numbers 00667698 (DN 20), 00659696 (DN 25), 00659697 (DN 32), 00659699 (DN 40) and 00659700 (DN 50), rated PN 75 and -25 to +90 degC; they need a 20 mm hole to be drilled and the socket welded on. Screw-in adapters in 316L are listed for G 1/2 (00669206), G 3/4 (00669205), 1/2 NPT (00699496) and 3/4 NPT (00699495), rated PN 25 and -25 to +90 degC.

The sensor can be rotated 360 degrees, so the housing may be aligned in any installation position regardless of flow direction, but the preferred direction is flow toward the M12 connector, and inlet and outlet sections follow the operating manual. Mounting position is horizontal or vertical. The sensor version with on-site calibration (99) allows calibration for low and high flow velocity when medium or velocity differ from the default settings.

Setup, accessories and enquiry details

A switch point can be set on site with the push button, and a PC setup program (CD-ROM 00694887) over a 3 m micro USB cable (00616250) archives and prints configurations and allows the output behaviour on over-range to be set. The micro USB interface is for configuration only and continuous operation through it is not admissible. M12 cable boxes with 2 m PVC cable are available straight (00404585) or angled (00409334).

See flow indicators and switches for further flow switches and indicators. Enquiries should state the liquid, pipe nominal width and material, temperature, pressure, desired switching or analog behaviour, and whether factory or on-site calibration is wanted.

Documents and quotation

Hosted for reference is the official JUMO data sheet 406041, version 2.00, thirteen pages in English, with technical data, installation recommendations, accessories and the order code. Seven Star LLC is an independent supplier in Muscat; send the order code and pipe details and we will prepare a quotation. Please include the full order code, the intended medium and the required quantity in your request so that the quotation matches the exact version listed in the data sheet.

Datasheets & Documents

Datasheet JUMO PINOS L02 data sheet 406041 V2.00 (EN, 13 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.

FAQ

Questions about the JUMO PINOS L02 Calorimetric Flow Sensor and Flow

Answers from our engineering team on installation, compatibility and integration.

01How does a calorimetric flow sensor work?

A heated element is cooled by the liquid; faster flow removes more heat, and that difference is converted into flow velocity.

02What outputs are available?

4 to 20 mA three-wire, a PNP switching output, or both, each assignable to flow velocity or medium temperature.

03What is the flow range and pressure rating?

0 to 300 cm/s with nominal pressure PN 75 and a burst pressure of 200 bar.

04Which pipe sizes are covered?

DN 20 to DN 50 in the standard order code, with other widths for the on-site calibration version.

05What is the medium temperature limit?

-25 to +90 degC for liquids without abrasive media.