HLS 305 Stainless Steel Level Sensor Features
Slim 19 mm Probe Diameter For Restricted Spaces
The compact 19 mm diameter design supports level measurement in narrow wells, boreholes, confined tanks and other space restricted installations.Continuous Hydrostatic Water Level Measurement
The piezoresistive stainless steel sensor measures liquid head pressure to provide a continuous 4 to 20 mA signal for level monitoring and control.Wide Standard Level Range Selection
Nominal ranges are available from 0 to 1 mH₂O through to 0 to 250 mH₂O, supporting applications from shallow water tanks to deep wells and open water locations.Low Thermal Effect And Long Term Stability
The sensing element is designed for low thermal error, excellent linearity and long term stability of up to ±0.1% of span per year.Stainless Steel Wetted Construction
The housing is manufactured from stainless steel 1.4404, equivalent to 316L, and the diaphragm from stainless steel 1.4435, equivalent to 316L, for reliable use with compatible water and thin fluid media.Submersible Protection For Demanding Environments
IP68 ingress protection, permanent short circuit protection and integrated overvoltage protection on the ground wire support dependable use in submerged and exposed installations.Cable Options For Water And Industrial Duties
PVC, PUR and FEP cable options are available with an integrated air tube for atmospheric pressure reference. The black PUR cable is specified with a drinking water certificate.Simple Two Wire Signal Integration
The standard 4 to 20 mA two wire signal provides straightforward connection to compatible PLC, remote monitoring and process control systems.
HLS 305 Applications For Water Level Monitoring In Narrow Locations
The HLS 305 is suited to continuous hydrostatic level measurement where a slim stainless steel probe is needed for clean water, wastewater or compatible thin fluids. Its narrow diameter, robust submerged construction and range of cable options make it well suited to water infrastructure, groundwater monitoring and tank level measurement.
Suitable applications include:
Groundwater monitoring wells
Borehole water level measurement
Open water depth measurement
Drinking water systems
Water storage tanks
Containers and process vessels
Wastewater level monitoring
Water treatment installations
Rainwater storage tanks
Irrigation water systems
Remote water level monitoring
Confined space liquid level installations
HLS 305 Slimline Level Probe Technical Specifications
| Specification | Details |
|---|---|
| Product Model | HLS 305 |
| Brand | SENSVISION |
| Product Type | Slimline stainless steel submersible level probe |
| Measuring Principle | Piezoresistive stainless steel hydrostatic pressure sensor |
| Nominal Level Ranges | 0 to 1, 1.6, 2.5, 4, 6, 10, 16, 25, 40, 60, 100, 160 and 250 mH₂O |
| Nominal Pressure Ranges | 0.1, 0.16, 0.25, 0.4, 0.6, 1, 1.6, 2.5, 4, 6, 10, 16 and 25 bar gauge |
| Overpressure Resistance | 1 to 100 bar, depending on selected nominal pressure |
| Maximum Ambient Housing Pressure | 40 bar |
| Output Signal | 4 to 20 mA, two wire |
| Supply Voltage | 12 to 36 VDC |
| Accuracy For Nominal Pressure Above 0.4 Bar | Up to ±0.35% of span |
| Accuracy For Nominal Pressure Up To 0.4 Bar | Up to ±0.50% of span |
| Optional Accuracy For Nominal Pressure Above 0.4 Bar | Up to ±0.25% of span |
| Long Term Stability | Up to ±0.1% of span per year |
| Response Time | Less than 10 ms |
| Supply Influence | 0.05% of span per 10 V |
| Load Influence | 0.05% of span per kOhm |
| Thermal Tolerance Band | Up to ±2% of span, depending on nominal pressure |
| Mean Temperature Coefficient | ±0.07 to 0.3% of span per 10 K, depending on nominal pressure |
| Compensated Temperature Range | 0°C to 50°C or 0°C to 70°C, depending on nominal pressure |
| Permissible Medium, Electronics, Ambient And Storage Temperature | Minus 20°C to 80°C, subject to selected cable temperature range |
| Housing Material | Stainless steel 1.4404, equivalent to 316L |
| Diaphragm Material | Stainless steel 1.4435, equivalent to 316L |
| Seal Materials | FKM or EPDM |
| Protection Cap Material | POM C |
| Cable Sheath Options | PVC, PUR or FEP |
| Cable Diameter | 7.4 mm |
| Cable Capacitance | 160 pF per m |
| Cable Inductance | 1 µH per m |
| Static Bending Radius | Ten times cable diameter |
| Dynamic Bending Radius | Twenty times cable diameter |
| Ingress Protection | IP68 |
| Maximum Signal Output Current | 25 mA |
| Weight | Approximately 100 g without cable |
| Probe Diameter | 19 mm |
| Electrical Protection | Permanent short circuit protection and reverse polarity protection |
| Overvoltage Protection | Integrated ground wire protection in accordance with CSN EN 61000-4-5 at 1 kV |
| Electromagnetic Compatibility | In accordance with EN 61326 |
| CE Conformity | EMC Directive 2014/30/EU |
| Wiring Colours | Supply positive white, supply negative brown, shield green and yellow |
| Accessories | Mounting flanges, terminal clamps and compatible process displays |