These products use a simple gold plated ball and electrode contacts. In motion, movement and tilt/tip applications the gold plated ball contact moves freely within a plastic or metal housing. When the ball connects with the electrode a circuit is made between the electrode and housing. Most switches have a second electrode attached to the housing for easy soldering. These switches tend to be very sensitive to shock or vibration so the contact ball on shock and vibration switches is normally spring loaded and factory set to a standard specification.

Capacitance sensors measuring principle is based on the physical properties of a capacitor formed by the sensor and it's immediate surround. The sensors normal electric capacity is affected by the dielectric value of any item approaching or covering the sensing area. This will cause oscillation and the resulting DC signal will trigger an output signal.

Based on conductivity technology, which measures the value of an conductive path between two probes. Designed with a special bias ring with opposing electrical polarity, which helps to eliminate secondary paths along the walls of containers and the build up of materials on the surface of the sensor.

Operates on the same principle as capacitance sensors by measuring the physical properties of a capacitor formed by the sensor's probe and it's immediate surround. The sensors normal electric capacity is affected by the dielectric value of any item approaching or covering the sensing area. This increase in dielectric value will be detected by the SIPOA modem and used to trigger a response.

Hall Effect sensors are operated by an activating magnet approaching the sensor. As the magnet actuator approaches the sensing face of the sensor the magnet's magnetic field (gauss) operates the hall sensor, which is coupled to a digital circuit built into the body of the sensor.

This patented design was originally used on construction equipment for speed control but requires an approved activator fitted around the sensor to sense any movement or position change. The flat sealed and robust construction is useful when used in harsh environments or where space is at a premium. The serial output link enables easy output resetting.

A reed switch has two ferromagnetic electrodes which are hermetically sealed into a glass capsule. When a magnetic field is applied to the switch the contacts are activated and change state (close/open). When the magnetic field is removed the natural spring tension in the electrodes causes them to return to their original state.

These sensors are comprised of a sensing resistive rod and magnetic float. The magnetic float is free to rise and fall with changes in the level of the liquid. The subsequent changes in resistance will be proportional to changes in the liquid levels. Using a PM50 Bargraph Panel Meter connected to the sensors output offers the opportunity of a clear visual display of liquid levels or interfacing to other controllers.

Three materials are available offering designers flexibility with higher temperatures and resistance to being de-magnetised. The NdFeB high gauss level magnets are supplied plated to give good corrosion resistance and improved appearance. The catalogue includes a guide to operating distances when using the magnet as an actuator with reed switches.

The contact assembly consists of a micro-switch in an enclosed housing with an actuating ball. When the float assembly is tilted the contact ball rolls and pushes the micro-switch actuating arm which in turn operates the spring loaded contact. When the float returns to its original position the ball returns and the actuating arm returns to its first position.

The sensor fitted into the end of the probe detects the presence of liquid. When the probe is immersed in liquid the internal infrared wave circuit detects a change in brightness between the sensors internal reflecting surfaces and feeds this change to a transistor output which is used to switch a relay circuit operating control equipment or alarm systems.

The switch is fitted with an infrared emitting diode and silicon photo transistor. A ball within the switch housing moves, when the switch is tilted into the path of the emitted infrared waves causing the switch to change state.

Used in control and positioning applications where an interrupter can be fitted to a moving object such as a lid or panel. When the object is moved the interrupter passes through the sensor slot in the switch causing the switches output to change state.

Suitable for applications where pressure change can be calibrated against capacity. The sensor can be supplied as part of an extended probe for liquid levels up to 4 metres or as a simple, compact screw in sensor with cable connection.

A well proven technology with many variations of design. The basic relay uses a reed switch contact surrounded by a wound coil. When the coil is energised the resultant magnetic field causes the reed switch contacts to close or open. Switch contacts can be supplied in normally open, normally closed and changeover styles. Relays can also be supplied in multi-contact configurations and moulding styles. We specialize in supplying custom relays against specific manufacturers drawings.

Proven technology offers a resistance change related to movement in temperature. Thermowells enable easy fitting into metal housings and stainless steel extended rods offer extra reach into more difficult locations.

A small transducer emits bursts of ultrasonic waves. Sound waves reflected back from the target are processed as echoes to produce an output signal proportional to the distance. Some versions have a synchronised input which enables several sensors to operate in a small area. Sensors will scan axially or radially.