Changsha Purple Horn E-Commerce Co., Ltd.
| Operating Temperature | - |
| Description | Gas Sensor RoHS |
| Mfr. Part # | VQ3BJ |
| Model Number | VQ3BJ |
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Product Specification
| Operating Temperature | - | Description | Gas Sensor RoHS |
| Mfr. Part # | VQ3BJ | Model Number | VQ3BJ |
The SGX Sensortech VQ3 is a catalytic flammable gas sensor, also known as a pellistor, designed for detecting a wide range of combustible gases in air. It operates within concentrations from 0% to 100% of the Lower Explosive Limit (LEL) for a given gas. The VQ3 is an established, general-purpose sensor for fixed gas detection systems, prioritizing low cost and stability. It is suitable for continuous or intermittent operation and is supplied as a matched pair of elements with a trimming resistor.
| Specification | Value | Notes |
|---|---|---|
| Model | VQ3 | Standard device, with stranded flexible leads. |
| Model | VQ3AA | Optimised for use with constant current circuitry operating at 300 mA. |
| Model | VQ3B | Supplied with pcb compatible leads. |
| Model | VQ3BJ | VQ3B with size 1206 chip resistor instead of standard wire ended resistor. |
| Operation | Continuous or intermittent | |
| Bridge Supply | 2.5 + 0.1 V | |
| Typical Bridge Current | 330 mA | |
| Minimum Sensitivity | 21 mV/% methane | |
| Linearity | Within 5% of reading up to 60% LEL (methane) | See Note 1 for further details. |
| Repeatability | 2% LEL (methane) | |
| Response Time (T50) | 2 seconds | Measured at 50% LEL methane. |
| Maximum Methane Concentration | 10% | See Note 2. Calibration check recommended if exposed to >100% LEL. |
| Typical Long Term Drift (Zero) | 0.5 mV/month | Assumes no exposure to poisoning chemicals. See Note 3. |
| Typical Long Term Drift (Span) | 2% signal/month | Assumes no exposure to poisoning chemicals. See Note 3. |
| Shock Test | 250 g, 5 blows in each plane | |
| Vibration Test | 20 g, 24 cycles from 100 to 3200 Hz | |
| Outline (VQ3, VQ3AA) Dimension A | 11.05 + 0.25 mm (0.435 + 0.010 in) | |
| Outline (VQ3, VQ3AA) Dimension B | 6.10 + 0.25 mm (0.240 + 0.010 in) | |
| Outline (VQ3, VQ3AA) Dimension C | 3.56 + 0.13 mm (0.140 + 0.005 in) | |
| Outline (VQ3, VQ3AA) Dimension D | 63.5 min (2.500 min) | |
| Outline (VQ3, VQ3AA) Dimension E | 1.0 mm (0.039 in) | |
| Outline (VQ3, VQ3AA) Dimension F | 5.84 + 0.51 mm (0.230 + 0.020 in) | |
| Outline (VQ3, VQ3AA) Dimension G | 8.20 max (0.323 max) | |
| Outline (VQ3, VQ3AA) Dimension H | 9.53 mm (0.375 in) | |
| Outline (VQ3, VQ3AA) Dimension J | 1.5 mm (0.059 in) | |
| Outline (VQ3B, VQ3BJ) Dimension A | 11.05 + 0.25 mm (0.435 + 0.010 in) | |
| Outline (VQ3B, VQ3BJ) Dimension B | 6.10 + 0.25 mm (0.240 + 0.010 in) | |
| Outline (VQ3B, VQ3BJ) Dimension C | 3.56 + 0.13 mm (0.140 + 0.005 in) | |
| Outline (VQ3B, VQ3BJ) Dimension D | 40.0 mm (1.575 in) | |
| Outline (VQ3B, VQ3BJ) Dimension E | 1.0 mm (0.039 in) | |
| Outline (VQ3B, VQ3BJ) Dimension F | 5.84 + 0.51 mm (0.230 + 0.020 in) | |
| Outline (VQ3B, VQ3BJ) Dimension G | 8.20 max (0.323 max) | |
| Outline (VQ3B, VQ3BJ) Dimension H | 1.5 mm (0.059 in) | |
| Trimming Resistor | Not less than 39 | Connected across the compensator element. |
Note 1: Further details on linearity corrections may be found in SGX Sensortech Pellistor Application Note 4.
Note 2: If the VQ3 is exposed to greater than 100% LEL concentration of a flammable gas whilst operating, the calibration of the instrument should be checked.
Note 3: Some flammable gases and vapours (e.g., silicones, fuel additives, sulphur-bearing compounds) can damage or poison pellistors. Long-term drift data assumes no exposure to such chemicals. Refer to SGX Sensortech Pellistor Application Note 6 for guidance on Pellistor Poisoning.
Note 4: The choice of 1 k for balancing resistors is arbitrary and assumes a high impedance measuring device. Lower impedance loads may require lower value balancing resistors.
Warning: SGX Sensortech recommends the use of a suitable flame arrestor for safe operation, regulatory compliance, and approval requirements.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Importer
Year Established:
2009
Employee Number:
300~500
Ecer Certification：
Verified Supplier
Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa... Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa...
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