Mishandling of the Hydran 201 sensor (such as a perforation or 
scratch on the membrane or subjecting the sensor to paint or 
solvent) voids the warranty. 
3.  Do not touch the H201 sensor’s membrane (located inside the threaded extremity) 
with  a  finger  or  an  object  (see  Figure  6-2  below).    The  membrane  is  easily 
damaged; this would impair the sensor permanently, thus voiding the warranty. 
 
Figure 6-2: Do Not Touch the Membrane 
4.  Do  not  block or  puncture  the  sensor’s  breathing  membrane.    Located above  the 
sensor’s  connector  (see  Figure  3-1)  this  opening  provides  oxygen  to  the  gas 
detector inside the sensor.  Blocking or puncturing this membrane damages the 
sensor permanently, thus voiding the warranty.