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Leak Detection Sensors
- Product Details
- Specifications
- Applications & Features
Leak Detection Sensors
Point Sensors Where a Leak Collects
Where a leak runs to one place, a single sensor is enough: a drip tray under a dosing pump, a sump, a pit, or the space between the walls of a double-walled tank. Each sensor is a switch (NPN or PNP) that wires to a ProAlert® 2 alarm, to a P2R relay, or straight into a PLC or controller input. They do not connect to the LeakDtec® or LeakPoint® cable controllers.
Three sensors:
- LD – a low, compact floor sensor in polypropylene, for conductive and corrosive liquids; adjustable sensitivity
- LDS – a capacitive proximity sensor that senses a conductive liquid up to 20 mm away, without touching it; PP, 316 stainless steel or PTFE body
- PES – a photoelectric sensor for liquids the others cannot see: oils, fuels, solvents and other non-conductive liquids
P2R Relay
The P2R-10T powers a sensor from 90–265 V AC (230 V AC directly) and turns its signal into a 5 A, 250 V AC relay contact, with an on and off delay of up to 5 seconds to stop the relay chattering.
Leak Detection Sensors Specifications
| Item | LD | LDS | PES |
|---|---|---|---|
| Principle | Capacitive floor sensor | Capacitive proximity sensor | Photoelectric (diffuse reflection) |
| Detects | Conductive liquids | Conductive liquids | Liquids including oils, fuels and solvents |
| Sensing | Liquid at the sensor, adjustable | Up to 20 mm, adjustable | Up to 40 cm (PES-40) |
| Output | NPN or PNP, max. 150 mA | NPN (200 mA) or PNP (100 mA) | NPN or PNP, 200 mA |
| Contact | NO (NC option) | NO or NC | NO or NC |
| Supply | 10–30 V DC | 9–30 V DC | 10–30 V DC |
| Body | Polypropylene | PP, 316 SS or PTFE | Plated steel, M18 |
| Protection | NEMA 4X | – | IP66 |
| Cable | 2 m PVC | 8 m PVC | PVC |
| Operating temperature | −20 to +60 °C | −25 to +80 °C (PP), −40 to +100 °C (SS) | – |
| Part numbers | LD-01N (NPN), LD-01P (PNP) | LDS-Y / B / S / T-N or -P-08 | PES-40-N-S (NPN), PES-40-P-S (PNP) |
Applications
- Drip trays under dosing pumps
- Sumps and pits
- Double-walled tanks
- Around pumps and valves
- Oil and fuel leaks (PES)
Key Features
- No controller needed: wire to an alarm, relay or PLC
- NPN or PNP output
- Adjustable sensitivity
- Chemical-resistant bodies
- Non-contact sensing (LDS, PES)
- Detects non-conductive liquids (PES)
