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Rapid TM-20A Digital Stopclock

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Brand: Rapid  MPN: TM-20A 
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Qty Unit Price (Ex VAT)
1+ £9.67

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38 in Stock, despatched same dayAdditional quantity lead time 4 weeks

The TM-20A is a high accuracy, easy to use unit that can be used either as a standard timer or may be automatically started and stopped by an externally connected device.

  • Uses a 30ppm quartz crystal and 27pF fixed calibrated capacitor for high accuracy
  • External start/stop control connection via 4mm jack sockets
  • Stop/Start and reset buttons on top of unit for easy activation
  • Elapsed time function
  • 15mm LCD display
  • Housed in an impact resistant ABS case
  • Requires 1x AAA 1.5 volt battery (supplied)
Max. Time Period 100min
Size 105 x 100 x 80mm
Type Digital

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*Question functionality currently disabled

30 November 2017 Question by: Rapid Customer | Product code: 85-1451
Q. Does this digital stopclock have an audio output
A. Hi Brett, thank you for your question. No this does not have an external audio output, only a remote start stop function.

08 August 2015 Question by: Rapid Customer | Product code: 85-1451
Q. would like to purchase the Tm-20a Digital Stopclock, can I have 2 external light gates first one for start timing and second gate to stop timing?
A. Hi Rocher, thank you for your question. This can be done via the terminals on the front of the stopclock. The trigger will need to be a switch closure.

08 July 2015 Question by: Rapid Customer | Product code: 85-1451
Q. What input is required to the external connections to start and stop the clock? Make or break a connection? A certain p.d.?
A. Hi John, thank you for your question. The unit takes 4mm jack plugs to be connected to the inputs as shown in the data sheet. Examples of this plug are 17-2887.


Good function but a bit lighweight

Reviewed by: Eg - 07 March 2014
Works fine but front plugs for timer leads are a bit lightweight. They need more solid retaining nuts inside.