HLC 870 Aggressive Media Level Probe

HLC 870 Aggressive Media Level Probe

The HLC 870 is designed for level measurement duties where wastewater, acids, alkalis and other aggressive liquids require a durable and media compatible sensing solution. Its flush mounted ceramic diaphragm reduces the risk of deposits accumulating on the sensor surface and makes cleaning easier where solid material is present in the liquid. The compact 35 mm diameter probe body is manufactured from PP HT, providing a practical construction for submerged applications.

A choice of cable and elastomer materials enables the HLC 870 to be selected for the media and temperature requirements of the installation. Standard measurement ranges extend from 0 to 4 mH₂O through to 0 to 100 mH₂O, with customer specific ranges available on request. The probe provides a 4 to 20 mA two wire output, IP68 protection and long term stability of up to ±0.1% of span per year. An optional SIL 2 version is also available for applications with functional safety requirements.

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SKU HLC 870 Category

HLC 870 Submersible Level Sensor Features

  1. Flush Ceramic Diaphragm For Easier Cleaning
    The flush mounted ceramic Al₂O₃ diaphragm helps minimise build up on the measuring surface, supporting easier cleaning in sewage, wastewater and liquids containing solid deposits.

  2. Designed For Aggressive Liquid Compatibility
    The PP HT housing, ceramic sensing diaphragm and selectable FKM, EPDM or FFKM seal materials allow the probe to be configured for many compatible acids, alkalis and aggressive process liquids.

  3. Continuous Hydrostatic Level Measurement
    The HLC 870 measures liquid head pressure to provide a continuous level signal for tanks, wells, treatment systems and storage applications.

  4. Stable And Accurate Measurement Performance
    Accuracy is specified at up to ±0.5% of span in accordance with EN IEC 62828-2. Long term stability is up to ±0.1% of span per year.

  5. Wide Standard Level Range Selection
    Standard ranges cover 0 to 4, 6, 10, 16, 25, 40, 60 and 100 mH₂O, allowing selection for shallow tanks, process vessels and deeper level monitoring points.

  6. Robust Submerged Installation Protection
    The IP68 protected design supports long term submerged use. The integrated air tube in the cable provides atmospheric pressure reference for gauge level measurement.

  7. Flexible Cable Material Options
    PVC, PUR and FEP cable sheaths are available, allowing the selected probe configuration to suit the required temperature range and media conditions.

  8. Functional Safety Version Available
    An optional SIL 2 version is available in accordance with IEC 61508 and IEC 61511 for suitable safety related applications.

HLC 870 Applications For Wastewater And Aggressive Media Monitoring

The HLC 870 is suitable for continuous level measurement in installations that handle wastewater, contaminated liquids and compatible aggressive media. Its ceramic diaphragm, plastic housing and flexible material selections make it a practical solution where liquid compatibility, straightforward cleaning and dependable submerged operation are important.

Suitable applications include:

  • Sewage treatment systems

  • Wastewater treatment plants

  • Water recycling facilities

  • Leachate and dumpsite monitoring

  • Wastewater collection tanks

  • Industrial effluent tanks

  • Acid storage vessels using compatible materials

  • Alkali storage vessels using compatible materials

  • Chemical process tanks

  • Contaminated water storage

  • Open liquid tanks

  • Industrial level monitoring systems

HLC 870 Hydrostatic Level Probe Technical Specifications

SpecificationDetails
Product ModelHLC 870
BrandSENSVISION
Product TypePlastic submersible probe for aggressive media
Measuring PrincipleHydrostatic level measurement with ceramic pressure sensor
Standard Nominal Level Ranges0 to 4, 6, 10, 16, 25, 40, 60 and 100 mH₂O
Standard Nominal Pressure Ranges0.4, 0.6, 1, 1.6, 2.5, 4, 6 and 10 bar gauge
Overpressure Resistance1 to 20 bar, depending on selected nominal pressure
Minimum Burst Pressure2 to 25 bar, depending on selected nominal pressure
Maximum Ambient Housing Pressure20 bar
Standard Output Signal4 to 20 mA, two wire
Standard Supply Voltage8 to 32 VDC
SIL Version Supply Voltage14 to 28 VDC
Accuracy≤ ±0.5% of span
Long Term Stability≤ ±0.1% of span per year
Response TimeLess than 10 ms
Supply Influence0.05% of span per 10 V
Load Influence0.05% of span per kOhm
Thermal Error≤ ±0.2% of span per 10 K
Compensated Temperature RangeMinus 25°C to 70°C
Permissible Medium, Electronics, Ambient And Storage TemperatureMinus 20°C to 80°C, subject to selected cable temperature range
Housing MaterialPP HT
Diaphragm MaterialCeramic Al₂O₃, 96%
Seal Material OptionsFKM, EPDM or FFKM
Cable Material OptionsPVC, PUR or FEP
Cable Diameter7.4 mm
Cable Capacitance160 pF per m
Cable Inductance1 µH per m
Static Bending RadiusTen times cable diameter
Dynamic Bending RadiusTwenty times cable diameter
Ingress ProtectionIP68
Maximum Current Consumption25 mA
WeightApproximately 200 g without cable
Housing Diameter35 mm
Electrical ProtectionPermanent short circuit protection and reverse polarity protection
Electromagnetic CompatibilityIn accordance with EN 61326
Optional Functional SafetySIL 2 in accordance with IEC 61508 and IEC 61511
Optional AccessoriesAssembly flanges and terminal clamps

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