Product Overview
The HITROL HR-30 Series is a top-mounted float-type level switch used for high-level, low-level and multi-point liquid-level detection.
As the liquid rises or falls, the magnetic float moves along the guide tube and activates internal reed switches at predetermined positions. The design has no complex electronic sensing components in contact with the process liquid, providing reliable operation and straightforward maintenance.
Main Features
- High- and low-level switching
- Multiple switching points available
- SPST or SPDT contact configurations
- Stainless-steel wetted construction
- Weatherproof and explosion-proof versions
- Custom insertion lengths and alarm positions
- Flanged or threaded installation
- Suitable for corrosive and industrial liquids
- Simple magnetic operation
- Low maintenance requirements
- Compatible with external alarm or control circuits
Technical Specifications
| Specification | Typical HR-30 Series details |
|---|---|
| Operating principle | Magnetic float with reed switch |
| Switch forms | SPST or SPDT |
| Number of switching points | One or multiple |
| Standard enclosure | Weatherproof, IP65 |
| Explosion-proof option | Available |
| Ambient temperature | Approximately –20°C to +60°C |
| Standard fluid temperature | Up to approximately +80°C |
| High-temperature version | Up to approximately +150°C |
| Maximum pressure | Up to 20 kgf/cm², configuration dependent |
| Wetted materials | SS304, SS316L, PVC or PTFE |
| Process connection | Threaded or flanged |
| Cable entry | Typically PF ¾-inch female |
| Float sizes | 1, 2, 3 or 4 inches |
| Contact rating | Depends on float size and contact configuration |
HR-30C-2F Marine Configuration
A typical marine-tank configuration previously selected is:
| Specification | Configuration |
|---|---|
| Model | HR-30C-2F |
| Installation | Top mounted |
| Switch arrangement | Two SPST contacts |
| AC rating | 250 VAC, 1 A |
| DC rating | 24 VDC, 0.5 A |
| Process connection | PF 2-inch BSPP male |
| Wetted material | SS316L |
| Float | 2-inch, approximately Ø49 × 50 mm |
| Guide tube | Approximately Ø12.7 mm |
| Overall insertion length | 1,575 mm |
| High-level position | 1,215 mm from top / 385 mm from bottom |
| Low-level position | 1,525 mm from top / 75 mm from bottom |
| Cable entry | PF ¾-inch female |
| Enclosure | Aluminium, IP65 |
| Maximum fluid temperature | Approximately 80°C |
| Maximum pressure | Up to 20 kgf/cm² |
Exact dimensions, switch positions, thread type and materials must be confirmed through an approved manufacturer drawing before production.
Typical Marine Applications
- Freshwater tanks
- Cooling-water tanks
- Fuel and diesel tanks
- Lubricating-oil tanks
- Bilge and drain tanks
- Sewage-treatment tanks
- Chemical-storage tanks
- Hydraulic-oil reservoirs
- Ballast and service tanks
- Industrial process vessels
Available HR-30 Variants
- HR-30S and HR-30SH
- HR-30C and HR-30CH
- HR-30V
- HR-30T and HR-30TH
- Explosion-proof versions of the applicable models
- PVC and PTFE versions for corrosive liquids
Selection Information Required
For an accurate quotation, confirm:
- Tank height and required insertion length
- High- and low-level switching positions
- Liquid type, density and temperature
- Operating pressure
- SPST or SPDT contact requirement
- Number of switching points
- Process connection size and standard
- Wetted-material requirement
- Weatherproof or explosion-proof enclosure
