- 1992: Caltest founded with offices in Elstead selling Hamburg meter testing equipment.
- 1993: Became UK and Ireland distributor for Pacific Power Source.
- 2003: Moved service and calibration to larger facilities in Camberley.
- 2009: Moved to large facilities in Guildford.
- 2009: Became part of the PPST group.
- 2009: UKAS accreditation for calibration lab.
- 2012: ISO 9001 accreditation achieved.
- 2019: Relocated to HQ in Petersfield, Hampshire.