Chassis Construction: Industrial strength, 18 Ga. Gray powder-coated steel. Pad-lockable hinged or screw-on cover style available.

Weight: 2.0 lbs.

Operating Temperature: 4 to 40°C

Storage Temperature: -20 to 20°C (to minimize sensor degradation)

Case Dimensions (H x W x D):

K-O2-Hx: 6.4 x 5.9 x 2.4 in (163.5 x 150.8 x 60.7 mm)

K-O2-Sx: 6.3 x 5.8 x 2.1 in (160.0 x 147.3 x 52.0 mm)

Sensor Vents: Natural ventilation through 18, 0.1 in (2.54 mm) diameter vents

External Indicators: Tri-color LED indicates operational status of sensor.

Knockouts: 4) ¾ in knockouts (1 per side)

Operating Power Voltage: 14 – 30 VAC (RMS) or DC Isolated power supply; separate transformer not required.

Power Consumption: < 5W

Control Relays: 2) separate SPDT line-voltage-capable relays for warning/ventilation and alarm outputs. UL-rated: 10 Amps max at 120/277 VAC or 30 VDC. (E43203)

Concentration Reporting Output: Isolated, powered 4 – 20 mA current loop output. 4 mA output => 0% concentration. 20 mA => 25% Maximum loop resistance: 510O

Termination: Pluggable screw-terminals for use with 12 AWG or thinner wire

Sensor Type: Galvanic cell

Measurement Range: 0 – 25% (by volume)

Analog Output Range: 4-20mA (corresponds to 0 to 25%)

Accuracy: ±0.3% O2 (typical after calibration)

Calibration Interval: 6 Months (to maintain specified accuracy)

Sensor Life: K-O2-x5: 5 years (typical) • K-O2-x10: 10 years (typical)

Recommended calibrated Field-Replaceable Sensor: KMOD-O2-25 (5 years) or KMOD-O2-50 (10 years)

Calibration Kit: UCK-1 kit

Calibration gases:

Span (20.9% oxygen, balance nitrogen): Kele PN:GAS-O2-20.9

Zero (100% nitrogen) Kele PN: GAS-N2

Warranty: 7 years