INSTRUMENT FREQUENCY OF CALIBRATION
ECOSCAN  

ecoscan_ph_5plus

 

12 months, at FFI.
PH 700  ph700_without_arm_b  12 months, at FFI.
PH SPEAR
(Testr 10, 20, 30)
 pHSpear  12 months, at FFI.
CYBERSCAN    12 months, at FFI.