Pneumatic Counters - FAQ
Most Kuhnke pneumatic counters are panel mount devices. Count is displayed mechanically. There are totalising versions (one display, normally 6 digits) which simply count pulses until reset. Predetermining or pre-set counters count up from zero to a pre-selected figure (2 displays, in 3 and 5 digit versions), or down to zero from a pre-selected figure(one display in 3 and 5 digit versions). In these counters a 3/2 valve is operated on completion of count. The normally closed valve switches to open. The counter remains open until it is reset. Counters vary by function, number of digits displayed, and reset method. Generally with M5 connections but some 4mm integrated push on connector options.
- Air Quality
- Dry non lubricated air filtered to 5 micron
- Reset Method
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- Manual - push button on front of unit (standard feature on all models except 8 digit totalisers). A small hole in the push button enables a padlock/device to be fitted for tamper protection.
- Pneumatic - Send a signal to the separate reset port.
- Auto - Counter automatically resets when preset is reached. Choose manual/pneumatic option or manual/auto option when selecting a model.
- Biggest Operating Problems
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- Oil in the air. Unit floods, works erratically and fails completely. No repairs possible.
- Overpressure (max 8 bar). Unit fails, no repair possible.
- Reset & count signals arrive together (pneumatic reset models). Check that there is no chance of a count signal arriving when reset is taking place. Unit locks out, often with last digit half-moved. Call The Timer and Counter Company for advice.
- "Ghost" reset signals on pneumatic reset
- Dirt on front buttons! If used in dirty conditions use a front panel protective cover (available with lock if required).
- M5 or 4mm tube connections?
- We recommend M5. Most counters are fitted into panels. M5 is more secure and more flexible in terms of what can be fitted to it. However 4mm push on tube connections are available options on some models.
- What is the difference between "Kuhnke" and "Hengstler" brand?
- There are two main differences. The Kuhnke brand product is black in colour and is unbranded in most cases on the front face. The most significant difference is that we maintain high levels of stock in the UK of the Kuhnke brand.
