Manual Calibration Dissolved Oxygen Meter

The ever increasing demand for instant  
on-site analysis results has created 
a need for innovative, rugged, 
portable and waterproof meters.
Field work can subject instrumentation to 
the inclemency of weather. Cold, rain, snow, 
dust and humidity can cause condensation 
to breech the housing. Once the housing has 
been compromised, the meter is susceptible 
to diminishing performance and life span. 
The rugged, waterproof housing of the 
HI9142 solves many of the problems of  
"eld use.
Calibration is performed with 
HI7040 zero oxygen solution, while 
100% calibration is done in air.
The polarographic probe (HI76407/4) is 
accurate to 0.3 ppm and is supplied with a  
4 m (13’) cable that allows measurements  
to be taken even in hard to reach places.