44-00-0297 SHERLOCK102/202 REV. 4.1 05-02-15
17
(Please see manual # 44-0342 "Oxygen Depletion Sensor" for
more information and the location of components.)
The SHERLOCK OXYGEN DEPLETION SENSOR (O
2
SENSOR) was designed to monitor concentrations of Oxygen
levels within an enclosed space. The sensor is mounted in the
space to be monitored and connected by cable to a SHERLOCK
monitoring control system. Each sensor is factory calibrated to
a sea level concentration of 20.9% oxygen clean air base zero
level at the factory prior to shipment. The O
2
Sensor should be
utilized as a signal source for the Sherlock 2-Series or Sherlock
4-Series refrigerant gas monitoring systems.
Please Note: When using the Electro-Chemical Oxygen
Depletion Sensor, be sure to select for SENSOR TYPE
"OXYGEN".
SPECIFICATIONS
SENSOR TYPE Electrochemical
ENCLOSURE NEMA 1
Inches (mm) 4.3 x 3.4 x 1.2 (109 x 86 x 31)
NEMA 3R Option Available
ENVIRONMENT 50 to 95 °F (10 to 35 °C),
0 to 95 % RH
non-condensing
POWER INPUT 12VDC, 250 mAmps
OUTPUT SIGNAL 0 to 5VDC
DETECTION RANGE 15% to 25% Oxygen by
volume
SENSITIVITY 0.5 % of full scale reading
CALIBRATION Every 6 Months
WARM-UP TIME Readings will stabilize
after 3 hours.
LIFE EXPECTANCY Factory Recommendation
of Replacing the sensor
every 5 years
NOTE: Sensor module must be mounted so that the sensor
(spool-like object) is sitting straight up and down with the
wires at the top.
SENSOR
WIRING TERMINAL
PROPER MOUNTING OF THE
ELECTROCHEMICAL SENSOR
23%
20%
14%
10%
6%
17%
P
E
R
C
E
N
T
B
Y
V
O
L
U
M
E
Oxygen Concentrations
Woozy, Judgement
impaired, emotional
outbursts, no appreciation
of danger
20.9% Air
19.5% OSHA/NIOSH
18% ACGIH
Increased Flamability
Hazard
Muscle Fatigue
Nausea and Vomiting
Unconsciousness
Dying
Death
Oxygen Concentration chart with agency guidelines
for setting alarm levels and danger limits.
OXYGEN DEPLETION SENSOR
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