מד חמצן בקרקע לחקלאות

Housed in a polypropylene body and
electronics are fully potted, ideal for long-term
deployment in porous media, including acidic
environments (mine tailings). Two head options
are available: a diffusion head that creates a
small air pocket for measurement in porous
media and a flow-through head with two
adapters for tubing that allows measurement of
gas flowing in lines.
Measurement Range 0 to 100 % O₂
Measurement Repeatability ± 0.1 % at 20.9 % O₂
Non-linearity Less than 1 %
Oxygen Consumption Rate 0.1 μmol O₂ per day at 20.95 % O₂ and 23 C (galvanic cell sensors consume O₂ in a chemical reaction with the
electrolyte, which produces an electrical current)
Response Time 14 s (time required to read 90 % of saturated response)
Operating Environment 0 to 50 C; less than 90 % non-condensing relative humidity up to 30 C; less than 70 % non-condensing relative
humidity from 30 to 50 C; 60 to 140 kPa
Meter Dimensions 126 mm length, 70 mm width, 24 mm height
Sensor Dimensions 32 mm diameter, 68 mm length
Diffusion Head (Accessory) 35 mm diameter, 35 mm length, 125 mesh screen
Flow Through Head (Accessory) 32 mm diameter, 91 mm length, 0.25 in barbed nylon connectors
Mass 210 g
Cable 2 m of two conductor, shielded, twisted-pair wire; additional cable available; TPR jacket (high water resistance, high UV
stability, flexibility in cold conditions)
Influence from Various Gases Sensors are unaffected by CO, CO₂, NO, NO₂, H₂S, H₂, and CH₄. There is a small effect (approximately 1 %) from NH₃,
HCI, and C₆H₆ (benzene). Sensors are sensitive to SO₂ (signal responds to SO₂ in a similar fashion to O₂). Sensors can be
damaged by O₃