Level switch model 5716 is suitable for detecting high or low level of bulk solids, in storage applications. The level detection is done based on RF capacitance principle using micro processor based measuring circuit. The sensing probe unit is built with two elements of positive and negative electrode as a single rigid rod construction. The separtion of the electrodes are done by using either PTFE or ceramic material depending on the temperature of the media. The negative element of probe called GUARD is always in contact with vessel wall through process connection. The tip of the probe acts as the sensing element. Whenever the process media comes into contact with the sensing part, capacitance value changes which will lead to actuation of relay. The probe part will have pulse amplifier circuit on the probe head which is connected to the remote control circuit through 2-core cable. Both the circuits are housed in a IP65 compliant weatherproof aluminium enclosure.
Flow Switch is a mechanical switch that is switched on or off in response to the flow or non-flow of a fluid such as air or water. The switch typically operates through the use of a paddle which gets displaced due to the force of fluid moving past it.Flow switch is a special electric device with a very simple design and of a small size. But despite of its simplicity, flow switch plays important role in the variety of different applications.
These switches find application in the detection of fluid flow and measurement of fan speeds. A flow switch might be used to protect a central heating system electric heating element from being energized before the air flow from the blower is established. Flow switches might also be used to alarm if a ventilation fan in a hazardous location fails and air flow has stopped. ⇒ Pump protection
⇒ Safety spray nozzle monitoring
⇒ Cooling water or heat exchangers
⇒ Oil well system testing
⇒ Drain line flow
⇒ Relief valve monitoring
Electromechanical pressure switches / Pressostats from Trafag provide high vibration resistance and switch point precision in combination with an extremely robust and durable design. This results in switches that can be operated for decades without requiring maintenance, even under harsh conditions. Various designs with bellows, membrane and piston sensors cover a wide variety of pressure ranges, media and load profiles for many different applications like hydraulics, the railway and shipbuilding industry and others.