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AGM 22
Thermal Conductivity Gas Transmitters for Detection of
H2,
He, Xe, and Other Gases
| Product
Specifications |
| Measuring Principle |
Thermal conductivity detection principle with silicon
micro-mechanics |
| Measuring Ranges |
Only binary or pseudo-binary gas mixtures. H2
in N2 (on air)/HE in N2
(or air)/He in Ar: 0-5%, 0-10%, 0-20%, 0-30%, 0-50%, 0-80%, 0-100%,
other ranges on request |
| Mechanical Dimensions |
PCB 160 x 100mm, Height 60mm |
| Weight |
max. 800g |
| Tube Connection |
3mm ID |
|
Performance |
| Response Time |
1. . . 45s, depending on used sensor element, flow, tube length,
digital time constant |
| Accuracy |
+ 2% FS |
| Stability |
+ 2% FS over 12 months |
| Repeatability |
+ 0.2% at zero, 1% at span |
| Lower Detection Limit |
< 1% FS |
| Linearity Error |
< 2% FS |
| Temperature Dependence |
+ 1% FS/10o
Kelvin at Zero, + 2% FS/10o Kelvin at span |
| Temperature Controlled Heater |
55o C
+
5o C, optional |
| Pressure Dependence |
0% at zero, < 2% FS/10 mbar at span (non compensated) |
| Pressure Compensation |
< 0.2% FS/10mbar at span (compensated between 800. . . 1200 mbar),
optional |
| Status/Failure Output |
+5V HCMOS on 34-Pin connector |
|
Communication |
| Analog Output Signals |
Selectable 0-20mA, 4-20mA, 0-1 VDC, 0-5 VDC, 0-10 VDC,
10 Bit resolution. linearized |
| Digital Output Signals |
RS232C Interface (V.28/V.24); linearized, 12 Bit
resolution |
| Digital Time Constant |
0.5s, 5s, 10s, 20s, DIP switch selectable |
|
Operation |
| Operating Supply Voltage |
24 VDC (18 - 30 VDC), 24 VDC (24 - 30 VDC) with heater
option |
| Average Power Consumption |
Max. 3W without heater option, max. 8W with heater
option 28W over 3 minutes (during warm-up) |
| Load at Current Output |
Typ. 250 Ω, max 500 Ω |
| Temperature Range |
0. . . + 50oC |
| Storage Temperature |
-20. . . +60°C |
| Flow Range |
0. . . 750 ml/min |
| Humidity Range |
0. . . 95% RH non condensing |
| Ready Status |
10s operation, 30 min full specifications |
| Alarm Settings |
Two adjustable alarms (Potentiometer), output signal
+5V HCMOS signal (no relay output) |
| Calibration |
Zero and span point with potentiometers |
Specifications are subject to change without notice.
While due caution has been exercised in the production of this web site,
possible errors and omissions are unintentional.
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