Brand: JUMO

JUMO MAERA S29 SW Titanium Level Probe

Name: JUMO MAERA S29 SW Titanium Level Probe | Seven Star LLC
Brand: JUMO
SKU: MAERA S29 SW

Description

Titanium and stainless level probe for seawater and sewage

The JUMO MAERA S29 SW (type 404393) is a hydrostatic level probe in titanium or stainless steel for continuous level measurement in ventilated tanks. Its titanium version was designed for liquids containing chlorides, such as in shipbuilding, swimming pools, and water and sewage management. A front-flush membrane with a screw-on protective cap offers an option for highly viscous media.

Typical applications named in the data sheet are tank and storage systems, clarification, settling and rainwater retention basins, sewage lifting and pumping stations, splash-water containers for swimming pools and ballast water tanks. The probe works from a depth as low as 1 metre of water column, has reverse-polarity protection, and is available with approvals for shipbuilding (titanium only) and explosion protection.

Technical specifications

Parameter	Specification
Data sheet type	404393
Output	4 to 20 mA two-wire; step response t90 2 ms; burden RL up to (UB – 16 V) / 0.022 A
Ranges	0 to 1, 1.6, 2.5, 4, 6, 10 mH2O; 0 to 100 mbar up to 2.5 bar relative; 0.6 to 10 bar absolute; sealed gauge 4, 6, 10 bar
Measuring principle	Piezoresistive sensor with separating membrane, synthetic oil
Long-term stability	0.2 to 0.4 % MSP per year depending on range
Process connection	Mounted protection cage diameter 95 mm; front-flush connection with protective cap (code 770)
Materials	Titanium (code 60, FEP cable) or stainless steel (code 20, PUR cable)
Cable	6-core shielded with integrated pressure compensation hose, AWG 24; FEP (Ti) or PUR (steel); lengths 2, 5, 10 m and longer
Diameter	27 mm (95 mm with protection cage)
Protection	IP68 (DIN EN 60529)
Mounting position	Vertical, hanging from the cable
Approvals as printed	ATEX SEV 17 ATEX 0136 X (404393/362, /662); UKEX EPS 22 UKEX 1 087 X (extra code 085); IECEx SEV 20.0010X; shipbuilding extra code 062

Order code highlights

The type 404393 carries a basic extension: 000 for none, 062 for shipbuilding approval (titanium only), 362 for explosion protection and 662 for shipbuilding approval plus intrinsic safety Ex i (titanium only). The input code selects a range such as 302 (0 to 1.6 mH2O), 306 (0 to 10 mH2O), 414 to 424 (mbar), 454 to 456 (bar relative) or 487 to 493 (absolute), with 997 to 999 for special ranges.

Output is 405 (4 to 20 mA). Process connection 759 is the mounted protection cage and 770 the front-flush connection with protective cap. Connection material 20 is stainless steel with PUR cable, material 60 is titanium with FEP cable, and cable length codes include 002, 005 and 010 (2, 5 and 10 m).

Choosing titanium or steel

Choose titanium wherever chloride content could attack stainless steel, as in seawater ballast tanks and brine, and select stainless steel with the PUR cable for ordinary water, sewage and pump-station duty. The front-flush protective cap suits viscous media and resists clogging, while the protection cage protects the membrane in basins with debris.

Since a probe hanging in a tank is exposed to the medium, check the wetted-material compatibility and apply the usual practice of keeping the cable vent end dry. Explosion-protected versions require an intrinsically safe supply circuit.

Documents and quotation

Open the attached JUMO MAERA S29 SW data sheet 404393 (EN) for the complete data and dimension drawings. Before you place an order, confirm the material, range and approval code with the system designer, then submit your request with the exact code; our team prepares the quotation. Related items are listed under Level Instrumentation.

Datasheets & Documents

Datasheet JUMO MAERA S29 SW data sheet 404393 (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.