pH and RPM

RPM
RPM is measured by three methods: mechanical, electric which uses reflections for optical RPM and stroboscopic. Testo offers instruments to suit all these methods.
pH
Testo have up to date and easy to use practical measurement engineering solutions suitable for everyday use on the field. Our pH probes which function with a gel electrolyte as a reference medium and which are leak proof, maintenance free and not affected by dirt ingress, unlike conventional sensors.