The Legris sensor fitting detects the absence of pressure and translates it to a high-pressure pneumatic output. When used to monitor the decaying or exhausting side of a pneumatic cylinder’s piston, it emits a positive output. When the cylinder comes to the end of its stroke, wherever that may be, the signal emitted from the sensor can then be used to pilot the next step.
Legris sensor fittings are very compact and can be mounted on the cylinder, on the control valve or on a terminal block provided it is between the cylinder and the flow control. For accuracy, the flow control regulator should be positioned as close as possible to the cylinder. It can also be fitted to a sensor fitting mounted on the cylinder.
Senses the end of the stroke and reverses the operation of cylinder sensor on each end (blind/red)
Variable end of stroke sensing capability not limited to a fixed return position
Mounting flow control directly on sensor provides an additional benefit of control without adding additional fittings
Pneumatic device does not require adjustment like mechanical devices
Pneumatic or electric version use with air piloted valve and solenoid piloted valve
No limit switch pneumatic or electrical
Models with electric output sensor:
Supplied with three core 0.5mm² cable, length 2 m (6.5 ft.)
Working pressure: 0 to 115 PSI
Threshold Signal Pressure: 7 PSI
Sutable fluids: compressed air
UL Listed Component Reset Pressure: 10 PSI
Current Rating: 5A/250V AC - 5W/48V DC
Cable: three core, 2m (6-1/2 ft.) long
Exhaust pressure is sensed by a N/O, N/C contract relay switch.
Pneumatic/Electric Threshold valves are ideally suited to turn on or off a light, or to send an electric signal to another function in the system. They are supplied with a 6 ft., three core cable and can be used with AC or DC voltages.
Advantages for the user:
Replaces traditional sequence valves and/or limit switches
Eliminates on going normal adjustment associated with limit valves
Sequence valve signal
The threshold sensor can be mounted on the cylinder, on the control valve or on a terminal block provided it is between the cylinder and the flow control. For accuracy, the flow control is mounted as close as possible to the cylinder. It can be fitted to a sensor fitting mounted on the cylinder.