Guest guest Posted March 6, 2011 Report Share Posted March 6, 2011 Hello all My mercury sphyg has broken!!! I was wondering what others use? There seem to be lots on the market very reasonably priced but I am concerned about reliability and calibration?? Does anyone have any thoughts about these that they wouldn't mind sharing please. Thanku Lynda Quote Link to comment Share on other sites More sharing options...
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