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SEC Signature Process Gas Analyzer
The SEC Signature is a self-contained
optical gas analyzer designed for non-intrusive
continuous monitoring of process gases.
The infrared optical system is self-compensating
for most aging, environmental and contamination
effects resulting in excellent measurement
integrity. An industry standard analog
output provides complete remote alarm,
fault and calibration signals. The analog
output from the device can be connected
to chart recorders, data acquisition systems
or a process control system.
The SEC Signature Process Gas Analyzer
measures infrared light absorption due
to molecular resonances. The monitor is
tuned to the infrared signature of the
target gas or vapor, measuring light at
wavelengths absorbed by the target gas
and at wavelengths not absorbed by the
target gas. The gas concentration is determined
by calculating the ratios of the analytical
and reference levels. Embedded linearization
algorithms keep the output accurate over
the entire measuring range and embedded
compensation algorithms maintain measuring
accuracy over changing environmental conditions.
The SEC Signature Process Gas Analyzer
employs a reliable, directly opposed optical
system. No mirrors or reflecting surfaces
are used in this device. The anodized
aluminum surfaces of the optical chamber
are heated to discourage condensation.
Sapphire windows protect the optics eliminating
the corrosive effects found in many process
monitoring applications.
Once the unit is spanned to a specific
mid range gas concentration (a one-time
operation), routine calibration consists
of only re-zeroing the device periodically.
SEC Signature Process Gas Analyzer Features
| • |
Capable
of continuous monitoring for
gas vapors |
| • |
Low
cost |
| • |
Infrared
sensing technology |
| • |
Designed
for non-extractive sampling
installation |
| • |
Virtually
maintenance free |
| • |
Explosion
proof |
| • |
Immune
to poisoning and etching |
| • |
Designed
for harsh environments |
| • |
Compact
and lightweight |
| • |
Fast
response time |
| • |
Simple
calibration |
| • |
Self-compensating
optical bench (patented) |
| • |
Linear
output |
| • |
Unaffected
by humidity and pressure |
| • |
Heated
optical chamber |
| • |
Low
power consumption |
| • |
Operates
in anaerobic atmospheres |
| • |
Continual
self diagnostics |
| • |
4-20 mA output |
|
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SEC Signature Process Gas Analyzer Applications
| • |
Chemical |
• |
Petro
Chemical |
• |
Food
and Beverage Industry |
SEC Signature Process Gas Analyzer Specifications
MODELS
AND
PART NUMBERS |
|
EtO
– 142-0597
Hydrocarbon – 142-1014
CO2 – 142-0848 |
 |
| ACCURACY |
|
±
5% of reading or ± 3% full
scale (whichever is greater) |
|
| APPROVALS |
|
CSA,
CE |
|
| CLASSIFICATION |
|
Class
1, Division 1, Groups B, C and D |
|
| CURRENT
DRAW |
|
(@
24 VDC) 250 mA (average), 450 mA (peak) |
|
| ENCLOSURE
CONSTRUCTION |
|
Anodized
aluminum sapphire |
|
| HUMIDITY |
|
0-99%
(non-condensing) |
|
| INSTALLATION
CATAGORY |
|
Catagory
1, Pollution Degree 2 |
|
| MOUNTING |
|
3/4"
NPT |
|
| OPERATING
PRESSURE |
|
1
PSIA – 55 PSIA |
|
| OPERATING
TEMPERATURE |
|
0-65°
C |
|
| OPERATING
VOLTAGE |
|
18-32
VDC |
|
| ANALOG
OUTPUT |
|
0-20
mA (sourced) |
|
| DIGITAL
OUTPUT |
|
Interactive
PC link |
|
| POWER
CONSUMPTION |
|
6
watts (maximum) |
|
| RANGE
(adjustable) |
|
EtO –
0-2000 mg/liter
Hydrocarbon – 0-100% VOL
CO2 – 0-100% VOL |
|
| REPEATABILITY |
|
±
2% |
|
| WEIGHT |
|
18 ounces
|
|
| WIRE
CONNECTIONS |
|
Red
wire (+ 24 VDC)
Black wire (D.C. common)
Blue wire (4-20 mA output signal)
White wire (calibration/digital interface) |
|
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