J5S (1984 to 2004)	Back	Up	Next
The J5S was a slight redesign of the J4S to adapt it for automated assembly equipment and to improve its performance. The earliest J5S meters are labelled as Sangamo but this was soon changed to incorporate the Schlumberger name and logo. This model was discontinued in favor of the newer and more popular Centron meter.	Photo by David Dahle