2. Nice quality.
3. Small order is welcome.
4. Online payment.
5. Refund money in case of bad quality.
6. Sample offered but you need to pay it.
7. 1 year free repair for quality warranty.




Model | BGT-FGD500A/B-CH4 | BGT-FGD500E/F-CH4 | |
Display mode | LCD | no display | |
Output | BGT-500A/B:RS485 and 4-20mA dual output | BGT-FGD500E: four wire RS485 BGT-500F: three wrire 4-20mA (default) Two wire 4-20mA (can chose) | |
Working voltage | DC 24V12-30V | DC 24V12-30V | |
Working tenperature | -20-50 (can customized) | -20-50 (can customized) | |
Type | Industrial grade on-line explosion-proof type | ||
Test gas | SO2, O3, NO2, CO and so on | ||
repeatability | ≤±1% | ||
linear error | ≤±1% | ||
Reponse time | ≤3-20S Individual gases vary | ||
Protection level | IP65 |




A: BGT Technology (Beijing) Co., Ltd. is a trading company 100% holding by Beijing Guoxinhuayuan Technology Co., Ltd. Beijing
Guoxinhuayuan Technology Co., Ltd is manufacturer for emergency solutions and producs.
Q2. Can I have a free sample for testing ?
A: Sample order is acceptable, but need you to pay for the product cost and freight .
Q3. What about the lead time?
A: Sample needs 4-5 working days after receiving your payment, mass production needs extra 4-5 working days.
Q4: Is it OK to print my logo on the products? A: Yes, we support OEM/ODM service.
Q5: Do you offer guarantee for the products? A:Yes, we offer 1 year warranty to our products.
Q6: Can I visit your company?
A: Yes, warmly welcome to visit our company.
Q7. Do you have certifications?
A: Yes, we have ISO9001, ISO 14001, OHSAS18001, CE, etc.
Q8: How is the quality of your goods?
A: We make a commitment to offer products with good apperance and nice quality to customers. If there is some questions for the
product, we have after-sale team to serve you. And we offer 1 year warranty