An ISO 9001:2008 Certified Company
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An ISO 9001:2008 Certified Company |
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Inductive Proximity Switch (2 Wire DC)Working Principle An Inductive Alternative r.t. field is developed at the front of the sensing surface of the proximity switch. This field is generated by the resonant circuit coil of the oscillator. Energy is absorbed when a metal piece is brought into the r.f. field near the sensing surface, causing oscillation to stop. Hence the demodulated voltage feeding the trigger disappears. For DC Switches The trigger operates rapidly when oscillation stops and this trigger switches the output transistor, which can be either NPN or PNP to drive an electronic circuit or relay. For AC Switches A Thyristor is triggered when oscillation stops due to the presence of metal. This thyristor is connected in series with a bridge and this series combination is connected to the AC load. Advantages Of Proximity Switches These switches can be used where extreme conditions exist, e.g. 1 With lubricants and cutting oils 2 Under vibration 3 Environments where water and steam are present 4 Dusty environments, etc. Applications Inductive proximity switches or sensors are primarily used when any metallic object to be sensed. This is most wildly used in different type of applications like.-
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| Size (mm) | R- | R- | R- | R- | M-12x25 | M-12 | M-14 | M-16 | M-18 | M-30 | M-36 |
| 12x12x30 | 18x18x30 | 18x18x35 | 12x25x40 | Without Thread | |||||||
| Voltage (VDC) | 5-30 | 5-30 | 5-30 | 5-30 | 5-30 | 5-30 | 5-30 | 5-30 | 5-30 | 5-30 | 5-30 |
| Max. Load Current (m Amp.) | 100-150 | 100-150 | 100-150 | 100-150 | 100-150 | 100- 150 | 100-150 | 100-150 | 100-150 | 100-150 | 100-150 |
| Sensing Distance (mm)FM NFM | 4.0 | 6.0 | 6.0 | 4.0 | 2.0 4.0 |
2.0 4.0 | 3.0 5.0 | 4.0 6.0 | 5.0 8.0 | 10.0 15.0 | 12.0 18.0 |
| SwitchingFrequency (Hz) | 400 | 350 | 350 | 400 | 500 | 500 | 400 | 350 | 250 | 150 | 150 |
| No Load Current | 3-5 | 3-5 | 3-5 | 3-5 | 3-5 | 3-5 | 3-5 | 3-5 | 3-5 | 3-5 | 3-5 |
| Position Indicator | LED | LED | LED | LED | LED | LED | LED | LED | LED | LED | LED |
| Housing Material | Plastic | Plastic | Plastic | Plastic | Brass | Brass | Brass | Brass | Brass | Brass | Brass |
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