The MicroSet meter prover sphere detector was originally designed and developed in 1982, to satisfy a requirement for a 3" ball prover for butane and propane. A requirement which no existing proprietary unit could meet.
The secret of the MicroSet's exceptional repeatability is in its use of a reed switch capsule and the method by which it is calibrated.
Setting the switching position is achieved by use of a fixture to pre-load the plunger; the switch capsule is turned down until electrical contact is made, whereupon it is locked in position. Any MicroSet sphere detector that is set correctly using the same setting fixture can be exchanged in a pipe prover without significantly changing the base volume.
Calibration tests undertaken by Moore, Barrett & Redwood, the international calibration specialists, on a four detector 10" prover loop produced the following results:
Test No.
Flow Rate
Base Volume
Repeatability
Litres/min
SI Litres
1
350
1727.732
± 0.0025%
2
350
1727.833
± 0.007%
3
200
1727.725
± 0.0015%
4
350
1727.716
± 0.0045%
MicroSet Retrofit
Click to enlarge
We can manufacture special MicroSet sphere detectors to suit your application.
Given detailed dimensional information regarding your existing sphere detector boss our engineering department will design a Retrofit adaptor to suit. The MicroSetdesign is then tailored to suit the Retrofit adaptor and the existing detector boss.
The drawing and photo below show a Retrofit MicroSet. The period from receipt of purchase order and detailed information to despatch from our manufacturing facilites was only 5 working weeks.
