Georg Fischer Signet general purpose pH and ORP sensors are marked with a birth date code that is located near the amplifier connection of the sensors body. This manufacturing date code is important for two reasons:
Distributor that stocks pH and ORP sensors should use this code to rotate stock to ensure older sensors are
sold first.
1 st Digit = Month 2nd Digit = Year N = January 6 = 2001
M = February 7 = 2002
L = March 8 = 2003
K = April 9 = 2004
J = May 0 = 2005
H = June 1 = 2006
G = July 2 = 2007
F = August 3 = 2008
E = September 4 = 2009
D = October 5 = 2010
C = November 6 = 2011
B = December 7 = 2012
