Changsha Purple Horn E-Commerce Co., Ltd.
| Description | Gas Sensor RoHS |
| Mfr. Part # | VQ21TB |
| Model Number | VQ21TB |
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Product Specification
| Description | Gas Sensor RoHS | Mfr. Part # | VQ21TB |
| Model Number | VQ21TB |
The VQ21T Series Combustible Gas Sensor Elements are high-power, low-voltage, poison-resistant detectors designed for general-purpose fixed systems. Utilizing the catalytic oxidation principle, these pellistor sensors are capable of detecting a wide range of flammable gases and vapors, including methane in air mixtures from 0.1% to 5% (100% LEL). The VQ21T Series features significant advancements in bead structure, offering enhanced resistance to catalyst poisoning, particularly from silicones, resulting in a substantially longer operational life compared to standard pellistor designs. They are designed to be used in a draught-free environment and require a suitable flame arrestor for safe operation.
| Specification | Value | Notes |
|---|---|---|
| Gases Detected | Most flammable gases and vapours | |
| Bridge Supply Voltage | 2.0 + 0.1 V | |
| Sensor Current | 300 mA typical | |
| Sensor Power Consumption | 750 mW max | |
| Minimum Sensitivity | 15 mV/% | Affected by gas flow and mounting geometry |
| Linearity | Linear up to 3% methane | |
| Response Time (t50) | 2 s typical | Dependent on mounting type |
| Maximum Gas Concentration | 100% LEL | Calibration check recommended if exceeded |
| Shock Test | 250 g, 5 blows in each plane | Dependent on mounting conditions |
| Vibration Test | 20 g, 24 cycles from 100 to 3200 Hz | Dependent on mounting conditions |
| Operating Temperature | 400C 500C (Bead heating) | |
| Model Variants | VQ21T (Standard) | Flexible leads |
| Model Variants | VQ21TB | PCB mounting, flexible leads |
| Model Variants | VQ21TS | Solid leads for PCB mounting |
| Model Variants | VQ21TSB | PCB mounting, solid leads |
| Model Variants | Hydrogen Type | Modified for superior performance with hydrogen/reactive gases |
| Outline Dimensions (VQ21T/VQ21TS) | A: 11.05 0.25 mm (0.435 0.010 in) | |
| Outline Dimensions (VQ21T/VQ21TS) | B: 6.10 0.25 mm (0.240 0.010 in) | |
| Outline Dimensions (VQ21T/VQ21TS) | C: 3.56 0.13 mm (0.140 0.005 in) | |
| Outline Dimensions (VQ21T/VQ21TS) | D: 63.5 mm min (2.500 in min) | |
| Outline Dimensions (VQ21T/VQ21TS) | E: 1.02 mm (0.040 in) | |
| Outline Dimensions (VQ21T/VQ21TS) | F: 7.37 0.51 mm (0.290 0.020 in) | |
| Outline Dimensions (VQ21T/VQ21TS) | G: 8.20 mm max (0.323 in max) | |
| Outline Dimensions (VQ21T/VQ21TS) | H: 9.53 mm (0.375 in) | |
| Outline Dimensions (VQ21T/VQ21TS) | J: 1.52 mm (0.060 in) | |
| Outline Dimensions (VQ21TB/VQ21TSB) | A: 11.3 mm max (0.445 in max) | |
| Outline Dimensions (VQ21TB/VQ21TSB) | B: 6.35 mm max (0.250 in max) | |
| Outline Dimensions (VQ21TB/VQ21TSB) | C: 3.69 mm max (0.145 in max) | |
| Outline Dimensions (VQ21TB/VQ21TSB) | D: 40.0 mm min (1.575 in min) | |
| Outline Dimensions (VQ21TB/VQ21TSB) | E: 1.0 mm nom (0.039 in nom) | |
| Outline Dimensions (VQ21TB/VQ21TSB) | F: 7.88 mm max (0.310 in max) | |
| Outline Dimensions (VQ21TB/VQ21TSB) | G: 8.2 mm max (0.323 in max) | |
| Outline Dimensions (VQ21TB/VQ21TSB) | H: 1.5 mm nom (0.059 in nom) |
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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