Locking Solenoids for Metal Detection Systems

A manufacturer of metal detection equipment required a component to activate a failsafe system when metal was detected in the product stream. The solution needed an extremely fast response time to immediately stop equipment when metal was detected.

Customer Problem

Metal detection systems serve as a vital second check for metal contamination control programs in a food processing environment. A manufacturer of metal detection equipment required a component to activate a failsafe system when metal was detected in the product stream. The solution needed an extremely fast response time to immediately stop equipment when metal was detected.

The TLX Solution

Based on the requirements, TLX determined that the best solution was a custom latching solenoid. A short pulse would de-latch the solenoid quickly, activating the failsafe system on the equipment. The solenoid would remain in this de-latched position (using no power) until receiving a second pulse of opposite polarity. Compact size and low power consumption made this latching solenoid an excellent, cost-effective solution for the metal detection equipment.

Magnetic Locking Solenoid

Specifications
Stroke
4 mm
Coil resistance at 20°C
16 Ω
Supply voltage
9 Vdc
Reaction speed
12-15 ms
Minimum coil operating voltage
4.0 Vdc
Maximum coil operating voltage
9.9 Vdc
Force to extend (4.0 Vdc)
3.5 N (.786 lb)
Force retracted (4.8 Vdc)
6.7 N (1.506 lbs)

All TLX components are customized to fit system requirements, meaning technical specifications are unique to each customer and design. Examples given on our website are for illustration purposes only.

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