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Description
SMART SENSOR ST8900 4 in 1 Toxic Gas CO Carbon Monoxide Detector Hydrogen Sulfide H2S Oxygen Combustible Gas Test LCD Display Monitor, Sound Light Vibration AlarmDIY Supplies: Paint & Decorating Model Number: SMART SENSOR 4 in 1 Gas Detector This professional 4 in 1 gas detector is designed for detecting CO, H2S, O2 and LEL gas. It can continuously monitor the CO, H2S, O2 and LEL gas concentration in the surrounding environment, once the gas concentration reaches the level of the alarm, the alarm will sound, light and vibrate. High precision portable CO, H2S, O2 and LEL gas tester with compact size and light
- DIY Supplies:Paint & Decorating
- Model Number:SMART SENSOR 4 in 1 Gas Detector
This professional 4 in 1 gas detector is designed for detecting CO, H2S, O2 and LEL gas. It can continuously monitor the CO, H2S, O2 and LEL gas concentration in the surrounding environment, once the gas concentration reaches the level of the alarm, the alarm will sound, light and vibrate. High precision portable CO, H2S, O2 and LEL gas tester with compact size and light weight, very easy to carry and operate.
Features:
1. Detect 4 kinds of gas: carbon monoxide(CO), hydrogen sulfide(H2S), oxygen(O2) and combustible gas(LEL).
2. Continuously monitor the CO, H2S, O2 and LEL gas concentration in the surrounding environment with professional and accurate measurement.
3. Sound & light vibration alarm works when one of the CO, H2S, O2 & LEL gas concentration reaches the level of the alarm.
4. Can set automatic shutdown time and concentration of alarm value.
5. Large color LCD display with back-light for easy reading.
6. Can connect to a sampling pump to operate in closed place.
7. Can be widely used in shipping, mining, oil exploitation, chemical, gas pipeline, tunnel construction, coal, metallurgy, paper, fire, municipal, textile and other industries.
8. Size: 138*70*43mm, weight: 360g
Features:
1. Detect 4 kinds of gas: carbon monoxide(CO), hydrogen sulfide(H2S), oxygen(O2) and combustible gas(LEL).
2. Continuously monitor the CO, H2S, O2 and LEL gas concentration in the surrounding environment with professional and accurate measurement.
3. Sound & light vibration alarm works when one of the CO, H2S, O2 & LEL gas concentration reaches the level of the alarm.
4. Can set automatic shutdown time and concentration of alarm value.
5. Large color LCD display with back-light for easy reading.
6. Can connect to a sampling pump to operate in closed place.
7. Can be widely used in shipping, mining, oil exploitation, chemical, gas pipeline, tunnel construction, coal, metallurgy, paper, fire, municipal, textile and other industries.
8. Size: 138*70*43mm, weight: 360g
Specification:
| Package Weight |
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 4
Yummy pigs ear
Flavor Name: Pig Ears, Size: 12 Count (Pack of 1)
These are my dogs "special" treat. These range in size from large to small ears but my dog loves them all the same. Great for heavy chewers.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 6, 2026
★★★★★ 5
One-and-done treat for giant breeds (our 186lb foster approves)
Flavor Name: Pig Ears, Size: 12 Count (Pack of 1), Flavor Name: Pig Ears, Size: 12 Count (Pack of 1)
We foster a 186lb Saint Bernard, and finding treats that actually satisfy her without requiring half the bag has been a challenge. These pig ears? Game changer.
What makes these work:
- ONE ear = one satisfied dog (compared to other treats where the bag says “35 per day” and she’d still beg for more)
- Keeps her busy for about 5 minutes of focused chewing
- She does a little excited dance when she sees the bag—can’t even sit, just wiggles
- Zero crumbs or mess because she devours every single bit, then spends the next hour sniffing around hoping another one appears
- She immediately grabs it and heads to her favorite bed to settle in—doesn’t move until it’s gone
The only “issue”:
There’s a bit of oil/greasiness when handling them, but nothing a quick hand wash can’t fix (Mrs. Meyer’s Cucumber soap works great, just saying).
Bottom line: If you have a giant breed and you’re tired of buying treats that require multiple servings or disappear in one bite, these are it. One ear, complete satisfaction, Subscribe & Save so they just show up like a present you forgot you ordered. Our girl Ellie gives them 186 pounds of approval.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 1, 2025
★★★★★ 3
Size of Ears is Inconsistent
Flavor Name: Pig Ears, Size: 12 Count (Pack of 1)
A bit disappointing with the size, 1 large pig ear, the rest small and not actual whole pig ears. But Doggo enjoys them. No problems with digestion for him.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
★★★★★ 5
Just what the pet parent ordered
Flavor Name: Pig Ears, Size: 12 Count (Pack of 1)
As a furbaby parent of 2 huskies who are chewers in their first 3 yrs of their life, this product helps a lot. Very healthy, dogs love them, safe, and chewy. Definitely a winner. Love the price for my pockets. Give it a try, you won't be disappointed and your pup will thank you too.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
★★★★★ 1
Smell of plastic
Flavor Name: Pig Ears, Size: 12 Count (Pack of 1)
These had a very off-putting smell right out of the bag - each one smelled like plastic, almost as if they’d been sitting in the packaging for too long. My dog wouldn’t touch them at all, which says everything. Would not purchase again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
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