• Protocontrol Instruments (India) Private Limited

Zero Speed Detector For Centrifuge

The Centrifuges rotate at high speeds. To avoid the danger of untimely opening of the centrifuge door, a zero speed detector is used as a preventive/safety device. When the centrifuge is rotating, a solenoid is activated and the door remains closed even if someone tries to open it. The solenoid is de-activated when the centrifuge speed approaches zero. I.e., only when the centrifuge stops rotating.
Inductive Proximity Switch is used as a sensor and is placed in close proximity to the rotating object. On this object, metallic plates are fixed. Proximity sensor detects the presence of metal objects that come within the range of their oscillating field giving rise to corresponding pulses. These pulses are fed to the control unit where they are compared with the standard pulses to sense the speed. Output is in the form of relay contact. Special sensor as well as control is available for use in hazardous area. The enclosures are certified by competent authority for use in Gas Group: IIA, IIB as well as IIC.