Oldham, Gas Detectors, models:

CPS Series	User Manual
CTX 300 CO2	User Manual
MX62	Installation And Utilisation Manual User Manual
OLC 10	User Manual
OLC 100	User Manual
OLCT 10N	User Manual
OLCT 20	User Manual
SV 4B	User Manual
Surveyor 4B	Installation, Operating And Maintenance Manual
ctx 300	User Manual