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Home | Products | Level | Level Transmitters | Hydrostatic (Submersible) | 404391

404391 – Level Probe for liquids - Critical applications

Measuring ranges: 50mbar to 1.6 bar.

Jumo 404391 – Level Probe for liquids
404391-000 Level Probe model
404391-022 Level Probe model

404391 Features

  • Level probe for continuous level measurement in liquids
  • Measuring ranges: 50 mbar to 1.6 bar (0.5 to 16 mH2O)
  • Medium temperature -20 to +60 °C
  • Capacitive ceramic sensor
  • Accuracy: 0.2 % MSP (linearity)
  • Ultra-precise measuring cell
  • Excellent long-term stability
  • Mechanical stress resistant membrane
  • High chemical resistance
  • High overload resistance (up to 80 times)
  • Integrated overvoltage protection with the stainless steel version
  • Reverse-polarity protection
  • Integrated temperature sensor Pt100 also available
  • Suitable for indoor and outdoor installations
Brand: JUMO
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  • Product Details
  • Technical Specs
  • Ordering Information
  • Documents

The JUMO MAERA F27 – 404391 level probe is used for the continuous hydrostatic level measurement in liquids. Filling heights between 0.5 and 16 mWS (water column) can be achieved in ventilated tanks.

When the level probe is immersed into a liquid, a liquid column emerges above the probe. The liquid column increases as the probe is immersed deeper into the liquid and creates a hydrostatic pressure on the measuring system by the force of its weight. The measured pressure is transmitted as a standard signal. The signal is linearly proportional to the rising liquid column.

The surrounding pressure is achieved through a special cable with an integrated pressure equalization hose. Any variations in air pressure are therefore automatically compensated and the surrounding pressure is taken into account. The installation can be performed in both indoor and outdoor areas.

A variant with integrated overvoltage protection is available for outdoor installations, which protects the level probe against damage in the event of lightning strikes in surrounding water. The version with a PTFE case is suitable for applications in aggressive mediums. With regard to the temperature-dependent density of a liquid, the medium temperature can be recorded with an integrated temperature sensor Pt100 during level measurement. This temperature value is then used to compensate.

Further information on our level probes from the JUMO MAERA series can be found in the brochure “Level Probes – Hydrostatic Level and Filling Level Measurement” in the Documentation category.

Installation Example:

Jumo 404391 Specifications
General Information
Reference conditions DIN 16086 and DIN EN 60770
Sensor system Capacitive ceramic sensor
Mounting position Vertical/hanging from the cable
Output
Analog output Current 4 to 20 mA, two-wire
Voltage DC 0.5 to 4.5 V, three-wire, ratiometric 10 to 90 % of the voltage supply
Step response T90 ≤ 10 ms
Burden Current: 4 to 20 mA, two-wire RL (UB-12 V) ÷ 0.02 A (Ω)
Voltage: DC 0.5 to 4.5 V, three-wire RL ≤ 10 kΩ
Mechanical features
Ensure the medium durability of the material!
Process connection Material Stainless steel 316 Ti
Sensor Material Ceramic Al2O3 (99.9 %)
Case Material
Standard Stainless steel 316 Ti
With basic type extension 022 PTFE
Seals FPM, standard EPDM, NTS 917
Protective cap (658) PVDF
Weight 200 g (without cable)
Diameter Stainless steel version 41 mm
PTFE version 50 mm
Environmental conditions
Admissible temperatures
Medium/environment -20 to +60 °C. The device must not freeze in the medium!
A restriction may be required depending on the medium.
With basic type extension 022 0 to 40 °C. The device must not freeze in the medium!
A restriction may be required depending on the medium.
Storage -20 to +100 °C, dry
Electromagnetic compatibility
Interference emission* Class B
Interference immunity** Industrial requirements
Overvoltage protection*** Integrated overvoltage protection. Rated leakage current: 1 kA
Protection type**** IP68, submersible to 16 m
* According to EN 61326-2-3
** According to EN 61326-1
*** According to EN 61000-4-5
**** According to EN 60529

  • Jumo 404391 Level Probe - Datasheet 234.00 KB
  • Level Probes Brochure from Jumo 1.56 MB
  • Jumo 404390 Series - Installation Instructions 1.81 MB
  • Jumo Level Probes - Installation Schematic 98.86 KB

Product Range

Product Range:
CodeSpecificationsPriceQuantity
404391/000-414-5

0~1m H2O with 5m of FEP cable, ceramic cell.
(404391/000-414-405-659-25-005)

$1,617.00
404391/000-414-10

0~1m H2O with 10m of FEP cable, ceramic cell.
(404391/000-414-405-659-25-010)

$1,790.00
404391/022-414

0~1m H2O with 10m of PE-LD cable, PTFE housing.
(404391/022-414-405-568-15-010)

$2,120.00
404391/022-452

0~4m H2O with 10m of FEP cable, PTFE housing.
(404391/022-452-405-568-25-010)

$2,027.00
404392-BOX.

Terminal box with built in pressure equalization filter

$165.00
404392-FILT

Pressure equalization filter for cable

$29.00

Note: Other ranges and cable lengths are available on request. Please contact us.

All prices are in NZ$, and GST exclusive and are subject to change without notice.

Intech Instruments Ltd are the New Zealand distributor for JUMO products. Please contact the JUMO distributor in your country if you require sales or service support for JUMO products.

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