Product overview
The Trafag ISP/ISPT 474 Picotherm is a compact, rugged thermostat developed specifically for shipbuilding and marine engine applications. It provides dependable temperature switching for alarm, protection and automatic control functions.
The thermostat operates mechanically through a temperature-sensing element and floating changeover contact. It does not require an external supply voltage for its switching function. Official Trafag product page.
Available models
| Model | Mounting arrangement |
|---|---|
| ISP 474 | Remote sensor with capillary tube |
| ISPT 474 | Direct mounting on the protection tube |
Technical specifications
| Specification | Details |
|---|---|
| Temperature ranges | From +5°C…+95°C up to +20°C…+150°C |
| Typical repeatability | ±1% of full scale |
| Output | Floating changeover contact |
| Contact arrangement | SPDT microswitch |
| Switching differential | Fixed; approximately 4°C or 5°C depending on range |
| Ambient temperature | −30°C to +70°C |
| Ingress protection | IP65 |
| Sensor maximum temperature | Up to 165°C, depending on version |
| Protection-tube diameter | 10 mm or 15 mm options |
| Protection-tube length | 65 mm or 150 mm options |
| Process connection | Version-dependent |
| Electrical connection | Plug connector, depending on configuration |
| Marine approval | DNV EU RO Mutual Recognition Type Approval |
| Compliance | EN 60730-1 and EN 60730-2-9, Type 2.B.H |
Standard variants
| Product model | Temperature range | Protection tube |
|---|---|---|
| ISPT9515 | +5°C to +95°C | Ø10 × 150 mm |
| ISPT9565 | +5°C to +95°C | Ø15 × 65 mm |
| ISPT11015 | +20°C to +110°C | Ø10 × 150 mm |
| ISPT11065 | +20°C to +110°C | Ø15 × 65 mm |
| ISPT15015 | +20°C to +150°C | Ø10 × 150 mm |
| ISPT15065 | +20°C to +150°C | Ø15 × 65 mm |
| ISP9515 | +5°C to +95°C | Ø10 × 150 mm |
| ISP9565 | +5°C to +95°C | Ø15 × 65 mm |
Main features
- Designed specifically for shipbuilding
- Compact construction for restricted installation spaces
- Rugged marine-duty housing
- No separate power supply required
- Reliable floating changeover contact
- High switching-point repeatability
- IP65 environmental protection
- Multiple mounting arrangements
- Several temperature ranges available
- Marine type-approved configuration
- Suitable for alarm and automatic control duties
Marine and industrial applications
- Main and auxiliary engine cooling systems
- Lubricating-oil temperature monitoring
- Fuel-oil heating systems
- Hydraulic-power units
- Gearbox temperature alarms
- Boiler and thermal-oil systems
- Compressor cooling systems
- Pumps and machinery skids
- Marine HVAC installations
- Heat exchangers
- Generator-engine temperature protection
