OS-2 Oxygen Sensor
1/27/2021
Kele, Inc. • 3300 Brother Blvd. • Memphis, TN 38133
Page 1 of 14
1
S
PECIFICATIONS
Mechanical
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
-20 to 50°C
Operating Humidity
15 – 90 %RH
Storage Temperature
-20 to 20°C (to minimize sensor degradation)
Case Dimensions (H x W x D)
6.4” x 5.9” x 2.4” (163.5 x 150.8 x 60.7 mm)
Sensor Vents
Natural ventilation through 18, 0.1” (2.54 mm) diameter vents
External Indicators
Tri-color LED indicates operational status of sensor.
Knockouts
4 trade ½” knockouts (1 per side)
TABLE 1: MECHANICAL SPECIFICATIONS
Electrical
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.
10 Amps max at 120/277 VAC (RMS) or 30 VDC.
Concentration Reporting Output
Isolated, powered 4 – 20 mA current loop output.
4 mA output => 0 % concentration. 20 mA => 25%
Maximum loop resistance: 510Ω
Termination
Pluggable screw-terminals for use with 12 AWG or thinner wire
TABLE 2: ELECTRICAL SPECIFICATIONS
Oxygen Sensor (O2)
Sensor Type
Galvanic cell
Measurement Range
0 – 25%
Analog Output Range
4mA to 20mA (corresponds to 0 to 25%)
Accuracy
±0.2% (Typical)
Calibration Interval
6 Months
Sensor Life
2 Year (Typical)
1
Calibrated Field-Replaceable Sensor
KMOD-O2
Calibration Kit
UCK-3 kit
TABLE 3: OXYGEN SENSOR SPECIFICATIONS
1
Exposure to harsh ambient environmental conditions may shorten sensor life.
