Benthic Rover Respirometer Chamber Volume
1.       Chamber volume
a.       Inside diameter of chambers: .303m (11.93”)
b.      Distance from top plate to bottom of acrylic: .121m (4.75”)
                                                               i.      Each mm of exposed knife adds: 72 cc
c.       8.7x10-3 M3 , 8700.9 cc or 530 cubic inches
d.      Add volume below valves
                                                               i.      Front valve:  48cc, or 2.65 in3   
                                                             ii.      Side valves (2): 25.2 cc, 1.54 in3
e.      Add volume around stirrer: ~ 5cc, .3 in3
f.        8700.9+48+25.2+25.2+ 5= 8804.2 cc
2.       Minus the volume of components inside the chamber
a.       Optode:  57.1 cc, or 3.48 in3
b.      Stir rods:  28.6 cc or 1.74 in3
c.        
3.       Total volume 8718 cc
a.       Don’t forget to add added/reduced volume based on level of sediment.