Nomad Gear Finder
My Saved Products 
TOPTES Guard-863Pro
TopTes Guard-863Pro 4 Gas Monitor Multi Gas Detector for H₂S, CO, LEL, and O₂, with TFT Color Screen, Upgraded O₂ Sensor (5-Year Lifespan), USB Data Export, 18h Battery Life, Reliable for Work & Home
In Stock
- Price
- $159.99
- Brand
- TOPTES
Prices from Amazon as of . Product prices and availability are accurate as of the date and time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of the product. As an Amazon Associate I earn from qualifying purchases.
Ranking within Category
Comparing this product to others on Nomad Gear Finder (in the carbon monoxide detectors category with a value specified):
- This product's Charging time is the lowest of 8: 2.5 hours
Specifications
These details are subject to change and may not be current. Please check Amazon or manufacturer web site to confirm before purchase.
Detection capabilities
- Gases detected
- CO, H2S, O2 and LEL (combustible gas)
Charging
- Charging time
- 2.5 hours
- Battery runtime
- 18 hours
Certifications
- Certifications summary
- UL, FCC
More specifications
- Warranty
- 3 Years
Features
Details from the TOPTES Guard-863Pro Amazon listing:
- Professional & Precise Detection: Guard-863Pro 4 gas monitor detects four critical gases—H₂S, CO, LEL, and O₂—with a fast 0.5-second response time. It has undergone stringent safety testing by an international certification body and delivers accurate, reliable performance even in demanding environments. The continuous triple alarm system (sound, light, and vibration) ensures immediate alerts until gas levels return to safe limits
- Upgraded O₂ Sensor with 5-Year Lifespan: Equipped with high-quality sensors from DDS (UK), the Guard-863Pro 4 gas monitor ensures reliable performance. The upgraded oxygen sensor offers an extended service life of up to 5 years, providing long-lasting protection in demanding environments
- TFT Color Display & Easy Data Export: Guard-863Pro 4 gas monitor features a vivid TFT color screen that displays real-time gas data, including gas concentration matrices and trend curves. Readings can be easily viewed and interpreted even in low-light conditions. Equipped with a USB data export function, it allows users to export alarm records, fault logs, calibration records, and operation history for efficient tracking and analysis
- Fast Charging, Long Battery Life: Guard-863Pro 4 gas detector requires only 2.5 hours to fully charge and provides over 18 hours of continuous operation, enabling extended gas monitoring in confined spaces. It also features a back clip design for easy carrying during work
- What You Get: Your purchase includes a Guard-863Pro gas detector, a packaging box, a user manual, a charging cable, and a standard gas hood. This device is suitable for a wide range of applications, including industrial manufacturing, mining, agriculture, emergency rescue, and home use
Similar products from other brands
Chosen for their similar specs and price:
 This productTOPTES Guard-863Pro |
 FORENSICS DETECTORS FD FD-90A-CO |
 Forsensal FS11301 |
 JuviPerpric IG-01 |
|
|---|---|---|---|---|
| Price | $159.99 | $99.45 | $139.99 | $134.99 |
| Model | Guard-863Pro | FD-90A-CO | FS11301 | IG-01 |
| Popular brand | No | – | – | No |
| Min. CO detection (ppm) | – | 0 | 0 | – |
| Max. CO detection (ppm) | – | 1,000 | 1,000 | – |
| Resolution (ppm) | – | 1 | 1 | – |
| Gases detected | CO, H2S, O2 and LEL (combustible gas) | CO | CO, H2S, O2 and LEL (combustible gas) | CO, H2S, O2 and LEL (combustible gas) |
| Response time (T90) (s) | – | 30 | 30 | – |
| Accuracy | – | ±5% F.S. | – | – |
| Sensor type | – | Electrochemical | Electrochemical | Electrochemical |
| Sensor life (years) | – | 2.0 | – | – |
| Built-in pump | – | No | Yes | – |
| Low alarm level (ppm) | – | 50 | 50 | – |
| High alarm level (ppm) | – | 200 | 150 | – |
| Adjustable alarm levels | – | Yes | Yes | Yes |
| Charging time (hours) | 2.5 | 3.0 | – | – |
| Battery runtime (hours) | 18 | 24 | 8 | – |
| Battery capacity (mAh) | – | 1,500 | 3,000 | 1,800 |
| Charging port | – | Micro-USB | USB-C | – |
| Battery chemistry | – | Lithium-ion | Lithium-ion | – |
| Weight (lbs) | – | 0.31 | 0.70 | – |
| Weight (kg) | – | 0.14 | 0.32 | – |
| Length (in.) | – | 4.30 | 2.36 | 2.00 |
| Length (mm) | – | 109 | 60 | 51 |
| Width (in.) | – | 2.30 | 2.60 | 2.70 |
| Width (mm) | – | 58 | 66 | 69 |
| Depth/Height (in.) | – | 1.70 | 5.75 | 6.00 |
| Depth/Height (mm) | – | 43 | 146 | 152 |
| Operating temp min (℉) | – | 0 | – | – |
| Operating temp max (℉) | – | 122 | 131 | – |
| Operating temp min (℃) | – | -18 | – | – |
| Operating temp max (℃) | – | 50 | 55 | – |
| NIST traceable calibration | – | Yes | – | – |
| ATEX / IECEx certified | – | Yes | – | – |
| Certifications summary | UL, FCC | ATEX | – | – |
| Warranty | 3 Years | 1 Year | 1 Year | – |
Data sources
Data for this product compiled from these sources:
Specifications last updated Oct 12, 2026.