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Specifications
Operating Temperature:
-
Mfr. Part #:
VQ5MB
Key Attributes
Model Number:
VQ5MB
Product Description
Product Overview
The VQ5 Series Thermal Conductivity Gas Detector Elements are designed for the detection of gases in 0-100% by volume concentrations. Operating on the thermal conductivity principle, these elements feature a sensing element exposed to the atmosphere under test and a reference element sealed in reference air. The response is determined by the difference in thermal conductivity between the test atmosphere and the reference air. The VQ5 series is available in two models: VQ5M with braided leads and VQ5MB with extended pins for direct PCB fitting. These detectors are suitable for various mounting arrangements, including direct flow or diffusion conditions.Product Attributes
- Brand: SGX Sensortech(IS) Ltd
- Series: VQ5
- Element Identification: Serial number (red on sensing, black on reference), red circular label on sensing element base.
Technical Specifications
| Model | Description | Bridge Supply | Bridge Power Consumption | Typical Response to Methane in Air (Open Circuit) | Response Time | Mounting | Shock Test | Vibration Test | Outline Dimensions (Millimetres) - A | Outline Dimensions (Millimetres) - B | Outline Dimensions (Millimetres) - C | Outline Dimensions (Millimetres) - D | Outline Dimensions (Millimetres) - E | Outline Dimensions (Millimetres) - F | Outline Dimensions (Millimetres) - G | Outline Dimensions (Millimetres) - H | Outline Dimensions (Millimetres) - Sensing Element | Outline Dimensions (Millimetres) - Reference Element |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| VQ5 / VQ5M | Flexi-leg sensor with compensator can. VQ5M has a sealed compensator can. | 2.0 + 0.1 V | 0.48 W max | 1.0 mV/% methane | See note 3 (function of mounting) | See page 3 | 250 g, 5 blows in each plane | 20 g, 24 cycles from 100 to 3200 Hz | 11.05 + 0.25 | 6.10 + 0.25 | 3.56 + 0.13 | 63.5 min | 1.0 | * | 8.2 max | 9.53 | 6.25 + 0.50 | 7.75 + 0.38 |
| VQ5B / VQ5MB | PCB legged sensor with compensator can. VQ5MB has a sealed compensator can. | 2.0 + 0.1 V | 0.48 W max | 1.0 mV/% methane | See note 3 (function of mounting) | See page 3 | 250 g, 5 blows in each plane | 20 g, 24 cycles from 100 to 3200 Hz | 11.05 + 0.25 | 6.10 + 0.25 | 3.56 + 0.13 | 40.0 min | 1.0 | * | 8.2 max | 1.5 | 6.25 + 0.50 | 7.75 + 0.38 |
Note 1: Operation may be under either direct flow or diffusion conditions in appropriate mountings.
Note 2: With open-circuit conditions at the bridge output.
Note 3: The response time is a function of the type of mounting used.
Note: No bends may be made in the length indicated by F.
Thermal Conductivity of Gases (Relative to air):
| Element Temperature (C) | 0 | 100 | 200 | 300 | 400 | 500 | 600 |
|---|---|---|---|---|---|---|---|
| Air | 1.000 | 1.000 | 1.000 | 1.000 | 1.000 | 1.000 | 1.000 |
| Nitrogen | 0.996 | 0.993 | 0.997 | 0.999 | 0.998 | 0.994 | 0.988 |
| Oxygen | 0.987 | 1.026 | 1.049 | 1.062 | 1.065 | 1.062 | 1.056 |
| Argon | 0.686 | 0.687 | 0.682 | 0.674 | 0.663 | 0.650 | 0.636 |
| Carbon dioxide | 0.621 | 0.745 | 0.832 | 0.893 | 0.933 | 0.959 | 0.975 |
| Water vapour | 0.969 | 1.076 | 1.192 | 1.303 | 1.404 | 1.493 | 1.574 |
| Methane | 1.244 | 1.500 | 1.723 | 1.911 | 2.066 | 2.192 | 2.296 |
| Ethane | 0.742 | 1.027 | 1.271 | 1.474 | 1.638 | 1.769 | 1.874 |
| Propane | 0.619 | 0.874 | 1.092 | 1.271 | 1.415 | 1.529 | 1.619 |
| Carbon monoxide | 0.961 | 0.962 | 0.970 | 0.975 | 0.976 | 0.974 | 0.970 |
| Ethylene | 0.703 | 0.970 | 1.195 | 1.378 | 1.524 | 1.637 | 1.727 |
| Acetylene | 0.886 | 1.040 | 1.155 | 1.240 | 1.301 | 1.344 | 1.376 |
| Hydrogen | 7.371 | 6.918 | 6.692 | 6.548 | 6.435 | 6.336 | 6.252 |
| Helium | 5.972 | 5.681 | 5.492 | 5.338 | 5.197 | 5.062 | 4.939 |
| Ammonia | 1.082 | 1.295 | 1.493 | 1.670 | 1.824 | 1.955 | 2.069 |
2411261432_Amphenol-VQ5MB_C3659380.pdf
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