Instruments need to be calibrated at regular intervals to provide top performance over their entire lifespan. At Eddyfi, we perform thorough calibration of our instruments, and even of Zetec's TC7700™ and MS5800™.
Also, should your instruments be in need of repair, we do that as well. But our instruments are well made; we do not expect to hear from you very often in that regard.
At Eddyfi, performance matters.