Immersed probe
The stainless probe enters the measured medium while the protective housing keeps the sensing element stable.
NH93420 series / immersion / 4–20 mA
NH93420 Liquid Level Transmitter for Immersion Measurement
Keep liquid-level signals stable from the probe to the control system. FOTIMA combines the NH93420 product with a pressure sensor supplier capability and a custom steam pressure sensor manufacturer discussion for demanding industrial environments.
All stainlessSealed submersible construction
4–20 mATwo-wire standard signal
Long-term immersionVented cable and sealed connection
Measurement path
Follow the signal from liquid pressure to control output
The NH93420 is easier to specify when the measurement chain is clear: the probe senses the pressure condition, the electronics process the signal, and the system receives a standard output.
Static-pressure difference
Liquid pressure is compared with atmospheric pressure through the vented cable path and sensor structure.
4–20 mA signal
High-accuracy circuitry converts the measured level condition into a standard signal for automation and control.
The official product detail keeps the probe, cable and connection relationship visible during installation planning.
Construction and protection
Set the boundary conditions before choosing the signal path
A sealed, submersible instrument still needs a clear application brief. Record the medium, depth, environment and control-system interface together.
| Construction | All-stainless, sealed, solid-state piezoresistive instrument |
|---|---|
| Working method | Two-wire operation |
| Output | Standard 4–20 mA signal |
| Cable | Waterproof cable with internal vent tube |
| Protection | Reverse polarity, overload current limiting, lightning and RF interference protection |
| Use condition | Long-term immersion when the application and installation are suitable |
Application fit
Translate the same measurement principle into the plant
The listed application fields share a need for dependable level information, but each one brings its own medium, access and maintenance constraints.
Chemical process
Review corrosion, deposits, foam and interference conditions when planning the probe and protection boundary.
Power plant
Connect level measurement with stable control signals and practical access for inspection and maintenance.
Municipal water
Define immersion depth, cable routing and installation access for tanks, wells or supply infrastructure.
Further reading
Use the field questions to sharpen an instrumentation brief
Select pressure sensors with protection for chemical plants
Frame electrical, foam, deposit and interference conditions before choosing the instrument.
Read the articleBuild reliable liquid-level measurement in power plants
Connect stable sensing with the plant’s control and maintenance workflow.
Read the articleClarify what an accurate liquid-level transmitter must deliver
Use construction, output and long-term stability as the starting points for comparison.
Read the articleApplication brief
Send the details that determine a workable installation
A focused inquiry helps the transmitter match the medium, depth and control environment instead of treating every tank or process as the same.
- Medium and densityLiquid type, density, temperature and corrosive or depositing behavior.
- Range and depthRequired level range, immersion depth and mounting position.
- Signal and cable4–20 mA interface, cable length, routing and control-system connection.
- EnvironmentAccess, weather, interference, maintenance and protection conditions.
FAQ
NH93420 liquid-level transmitter questions
What is the NH93420 series?
NH93420 is an all-stainless, sealed, submersible solid-state piezoresistive liquid level transmitter for industrial measurement and control.
How does the transmitter measure level?
It measures the difference between liquid static pressure and atmospheric pressure, then converts that difference into a standard electrical output.
What output does it provide?
The product is described as a two-wire instrument with a standard 4–20 mA output signal.
Can it remain immersed in liquid?
Its sealed construction, probe and vented cable are designed for long-term immersion when the application and installation are suitable.
Which environments can use it?
Listed applications include petroleum, chemical plants, power plants, municipal water supply and water-temperature exploration.
What should be included in an inquiry?
Share medium, density, range, immersion depth, output, cable length, temperature, installation conditions and control-system requirements.
