Let see what is your criterial or wish the temperature or pressure calibrator can give you. Accuracy? Convenient and ease of use e.g. can bring to site or field? Then you can look further in good brands like Ametek, Mensor, TIS, Druck, Budenberg ... Cheaper alternatives source from RS, OMEGA...
Ask an ISO17025 accredited lab with certified force calibration in compression mode to bring a calibrated loadcell up to 25 tonf or above to get it calibrated against the gauge in situ on your site. You will be give a certified report to give you confidence of the force read from the pressure...
