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LRC5A21-20 IMO Limit Switch, Compact Coiled Spring + Cats Whiskers
IMO LRC5A21-20 compact IP67 industrial limit switch with a coiled spring and cats whisker actuator, 1NO + 1NC snap-action contacts, technopolymer housing and M20 cable entry for flexible machine position detection.
£18.18
Why Choose the IMO LRC5A21-20 Limit Switch?
The IMO LRC5A21-20 is a compact industrial limit switch designed for mechanical position, presence and end-of-travel detection in machinery and automated systems. Part of the IMO LR series, it combines a durable plastic body with a coiled spring and cats whisker actuator, providing flexible multidirectional actuation where precise alignment with a rigid actuator may be impractical.
The flexible cats whisker actuator can be deflected by passing products, machine components and moving mechanisms from different directions. This makes the LRC5A21-20 particularly useful for applications involving variable object positions or broad-area mechanical detection, while its 1NO + 1NC snap-action contacts provide rapid and repeatable electrical switching.
The LRC5A21-20 features an IP67 rated technopolymer enclosure and a single M20 cable entry. With a maximum operating speed of 1 m/s, minimum operating torque of 0.07 Nm and mechanical endurance of up to 20,000,000 operating cycles, it provides a durable solution for repetitive industrial position sensing.
Key Advantages
- Coiled spring and cats whisker actuator provides flexible multidirectional detection.
- Suitable for detecting passing objects where exact actuator alignment may vary.
- 1NO + 1NC contact configuration provides both normally open and normally closed signalling.
- Snap-action switching mechanism provides rapid and repeatable contact operation.
- IP67 protection rating supports use in demanding industrial environments.
- Single M20 cable entry provides a convenient connection format for industrial wiring.
Key Features
- IMO LR series compact limit switch.
- Coiled spring and cats whisker actuator.
- 1 normally open + 1 normally closed contact.
- Snap-action contact mechanism.
- IP67 rated technopolymer enclosure.
- Maximum operating speed of 1 m/s.
- Minimum operating torque of 0.07 Nm.
- Mechanical endurance up to 20,000,000 operations.
- Maximum operating frequency of 3,600 operations per hour.
- Single M20 cable entry for electrical connection.
Flexible Multidirectional Position Detection
The IMO LRC5A21-20 uses a flexible coiled spring and cats whisker actuator rather than a rigid plunger or lever. When a moving object deflects the actuator, the internal snap-action contacts change state, allowing the switch to provide position or presence signals to PLCs, relays, contactors and other industrial control equipment.
This actuator arrangement is especially useful where the position of the detected object can vary or where contact may occur from different directions. Combined with its compact IP67 enclosure, high mechanical endurance and M20 cable entry, the LRC5A21-20 provides a practical solution for repetitive sensing on conveyors, production machinery and automated handling equipment.
Typical Applications
- Machine position and end-of-travel detection.
- Industrial conveyors and material handling systems.
- Detection of passing products and machine components.
- Packaging and production machinery.
- Automated manufacturing equipment.
- OEM automation systems and machine building.
Technical Specifications
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| Device Type | Limit switch | |
|---|---|---|
| Switching Action | Snap action | |
| Contacts | 1NO + 1NC | |
| IP Rating | IP67 | |
| Actuator Type | Spring rod / wobble stick | |
| Housing Material | Plastic | |
| Connection | M20 cable entry | |
| Manufacturer | IMO Precision Controls | |
| Series | LR | |
| Model | LRC5A21-20 | |
| Product type | Industrial limit switch | |
| Actuator type | Coiled spring and cats whisker | |
| Contact configuration | 1NO + 1NC | |
| Switching action | Snap action | |
| Protection rating | IP67 | |
| Maximum operating speed | 1 m/s | |
| Minimum operating torque | 0.07 Nm | |
| Mechanical endurance | Up to 20,000,000 operating cycles | |
| Maximum operating frequency | 3,600 operations per hour | |
| Maximum voltage | 400 V | |
| Maximum current | 10 A | |
| Housing material | Technopolymer plastic | |
| Connection type | Screw terminals | |
| Conductor size | 0.5–2.5 mm² | |
| Cable entry | 1 × M20 | |
| HS Code | 8536500700 | |
| Country of Manufacture | Italy |
Frequently Asked Questions
What is the IMO LRC5A21-20 used for?
The IMO LRC5A21-20 is used for mechanical position, presence and end-of-travel detection in industrial machinery, conveyors, material handling equipment and automated control systems.
What actuator does the LRC5A21-20 use?
The LRC5A21-20 uses a coiled spring and cats whisker actuator. Its flexible construction enables mechanical detection where the position or direction of contact can vary.
What contact configuration does the LRC5A21-20 have?
The LRC5A21-20 has a 1NO + 1NC contact configuration with snap-action switching, providing one normally open and one normally closed contact for industrial control circuits.
What is the protection rating of the IMO LRC5A21-20?
The LRC5A21-20 has an IP67 protection rating, making its technopolymer enclosure suitable for demanding industrial machine installations.
What cable entry does the IMO LRC5A21-20 have?
The LRC5A21-20 has a single M20 cable entry. This distinguishes it from the LRC5A21 version, which uses a PG13.5 entry.
Trusted Industrial Switching from IMO
IMO LR series limit switches provide dependable mechanical position detection for machine builders, control panel manufacturers and industrial automation engineers across a wide range of machinery and process applications.
