The OxyGuard CO2 is a reliable and easy to use instrument that measures the free dissolved carbon dioxide concentration directly in the water. The CO2 concentration is shown on the display, and there is an analogue output. The OxyGuard CO2 measures the free dissolved CO2 directly and is not affected by carbonates or other dissolved substances. It is the free dissolved CO2 - in other words the CO2 gas partial pressure - that affects the fish. The OxyGuard CO2 thus gives simple, continuous and direct measurements of the amount of carbon dioxide in the water that will affect the fish. The analyser is easy to calibrate using the front panel "slope" and "zero" adjustments - after which you just put the probe in the water and measure. Calibration intervals are long, and the OxyGuard CO2 does NOT need regular maintenance.

The OxyGuard CO2 Dissolved CO2 Analyser consists of a probe and a mains powered transmitter. The latter has a display, "slope" and "zero" adjustments as well as a 4-20 mA analogue output signal. The probe is delivered with a 7 m cable that can be shortened as desired. The probe measures the carbon dioxide content of the water directly by detecting the carbon dioxide partial pressure in the water. It is important to note that it is NOT based on a pH measurement - it does NOT detect any change in pH that carbon dioxide causes. Neither does it withdraw a sample for analysis - it detects the free...