Atmospheric Oxygen Meter measures from 0-100%.

Press Release Summary:

Utilizing maintenance-free galvanic electrode that is unaffected by H2S and CO2, Model 630 measures atmospheric oxygen from 0-100% with 0.1% resolution and ±1% FS accuracy, ±1 digit. User attaches electrode to meter and uses screwdriver to adjust meter to display 20.9% (air) or to any gas of known concentration. Operating on single 9 V battery, meter features 0.5 in. high LCD, low battery indicator, and automatic temperature compensation from 0–40°C.

Original Press Release:

Model 630 Atmospheric Oxygen Meter

The Model 630 measures atmospheric oxygen from 0-100%.  Its unique galvanic electrode has an expected life of 3 to 5 years.  The electrode is not affected by hydrogen sulfide (H2S) or carbon dioxide (CO2)  The maintenance-free electrode eliminates problems associated with electrodes requiring membrane replacements and filling solution changes.

Easy to operate, the Model 630 has only one control knob with two positions:  OFF and %.  Calibration is quick and easy.  Simply attach the electrode to the meter and use a small screwdriver to adjust the meter to the display 20.9% (air) or to any gas of known concentration.  The screwdriver adjustment eliminates any chance the Model 630's calibrations will be accidentally disturbed.

The instrument is sold in a kit which includes the meter, an electrode with a 5 ft. cable length, instructions, battery and carrying case.  Electrodes with custom cable lengths are available upon request


Range: 0-100% Atmospheric Oxygen

Resolution: 0.1%

Accuracy: ± 1% of full scale, ± 1 digit

Precision: ± 0.1

Hysteresis: Nonexistent

Temperature Compensation: Automatic from 0-40°C

Response Time: 95% in 30 seconds or less

Pressure: 25 psi maximum

Warranty: Meter:  2 years

Sensor:  1 year


Switch: OFF - %

Calibration: Screwdriver adjustable to 20.9% in air or any known gas


Display: 0.5" high LCD

Power: Single, 9V battery

Battery Indicator: "BAT" displays when battery is low

Size: Meter: 6.00"L x 1.55" W x 3.70"H

Sensor:  1.0" dia. x 2.0" length, cable length: 5 ft.

For additional information, write to:

RWC Testing & Lab Supplies

1821 N. Zaragoza Rd. PMB 640

El Paso TX 79936

Phone: 915-852-3375

Fax:  915-852-4084




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