sierra-monitor-corporatio sentry 5100 series Manuel D’Utilisation

SENSORS

Electrochemical sensors are fuel cell-like devices consist-
ing of an anode, cathode, and electrolyte.  The compo-
nents of the cell are se-
lected so a subject gas
allowed to diffuse into the
cell will cause a chemical
reaction and generate a
current.  The cells are dif-
fusion limited, so the rate
at which the gas enters
the cell is solely depen-
dent on the gas concentration.  The current generated is
proportional to the rate of consumption of gas in the cell.

Unlike other electrochemical sensors where gas diffuses
through membranes into the cell, Sierra Monitor sensors
allow gas to diffuse into the sensor through a simple cap-
illary.  The result is an extremely stable sensor with very
low temperature and pressure coefficients.

Zero Drift:

Less than 5% per year

Calibration Frequency:

90 Days Recommended

Transmission:

Digital – RFI, EMI immune

Warranty:

2  years

Housing:

Explosion proof (NEMA 7)

(Div. 1, Class 1, Groups C,D)

Optional upgrade to Group B,
NEMA 4X

Dimension:

7.6 X 4.6 X 4.2 inches
(19.3 X 11.7 X 10.7 cm)
Note that 5100-26 is larger

Weight:

2.7 lb. (1.3 Kg)

Note 1:

Diffusion via membrane

Hydrogen

5100-07

Electrochem 0-1,000 PPM

90% <30 sec. 2 yr.

4

 o 

to 122

 o

 F (-20

 o

 to 50

 o

 C)

15-99%  RH

Sulfur Dioxide

5100-10

Electrochem 0-100 PPM

90% <20 sec. 2 yr.

4

 o 

to 122

 o

 F (-20

 o

 to 50

 o

 C)

15-99%  RH

Nitrogen Dioxide

5100-12

Electrochem 0-20 PPM

90% <35 sec. 2 yr.

4

 o 

to 122

 o

 F (-20

 o

 to 50

 o

 C)

15-99%  RH

Carbon Monoxide

5100-13

Electrochem 0-1,000 PPM

90% <25 sec. 3 yr.

4

 o 

to 122

 o

 F (-20

 o

 to 50

 o

 C)

15-99%  RH

Carbon Monoxide

5100-16

Electrochem 0-2,000 PPM

90% <35 sec. 2 yr.

4

 o 

to 122

 o

 F (-20

 o

 to 50

 o

 C)

15-99%  RH

(Hydrogen Tolerant to
2,000 PPM H2)
Nitric Oxide

5100-19

Electrochem 0-20 PPM

90% <15 sec. 3 yr.

4

 o 

to 122

 o

 F (-20

 o

 to 50

 o

 C)

15-99%  RH

Hydrogen Chloride

5100-21

Electrochem 0-20 PPM

90% <100 sec. 2 yr.

4

 o 

to 122

 o

 F (-20

 o

 to 50

 o

 C)

15-99%  RH

Hydrogen Cyanide

5100-22

Electrochem 0-20 PPM

90% <70 sec. 2 yr.

4

 o 

to 122

 o

 F (-20

 o

 to 50

 o

 C)

15-99%  RH

Hydrogen Fluoride

5100-26

Electrochem

1

0-10 PPM

90% <30 sec. 1 yr.

14

 o

 to 113

 o  

F(-10

 o  

to 45

 o 

C)

20-95% RH

Ethylene Oxide

5100-27

Electrochem 0-20 PPM

90% <90 sec. 2 yr.

4

 o 

to 122

 o

 F (-20

 o

 to 50

 o

 C)

15-99%  RH