Biogents
Biogents BG-Sentinel 2
Trap · Device
Pros
- Genuinely catches host-seeking mosquitoes with CO2, heat, and scent (about 20-40% fewer bites where well placed)
- Chemical-free and far more selective than a bug zapper
Cons
- Thins the mosquito population slowly over the season rather than protecting you on the spot
- Results swing hard with placement: set it between the breeding area and where you sit, never right next to you
- Needs lure refills and continuous running to keep working
- Expensive up front for a modest, hard-to-verify reduction in bites
The full review
Suction trap from Biogents that draws host-seeking mosquitoes into a catch bag using a low-power 12V fan pulling about 3.6 watts. It works by imitating a person: visual contrast combined with the BG-Lure artificial-skin scent mimics human emanations, and adding CO2 broadens what it catches. It is the reference trap behind more than 300 scientific publications on Aedes, dengue, and Zika, which is why researchers reach for it when they need reliable adult-mosquito surveillance. The BG-Lure and CO2 are sold separately, and the unit itself runs about two hundred nine dollars before lures, gas, and power. It is fundamentally a surveillance and research instrument rather than a marketed backyard bite-protection product, so buying it expecting a patio to feel clear misreads what it is designed to do.
Scorecard
Expand any pillar to see exactly why it scored what it did.
Effectiveness45%15This is a trap, not applied to skin: it lures host-seeking mosquitoes with CO2, heat, and scent and captures them, thinning the local biting population by roughly 20-40% where it is well placed and run continuously, with a single unit's real effect on the modest side. Its job is to thin a yard's mosquito population over time, and it works slowly as that population turns over. Results swing widely with placement, competing hosts (nearby people and pets pull mosquitoes away from the trap), and whether you run it all season. Scored on how well it does that job deployed as intended, with a light temper for the real-world swing in placement and competing hosts (lower confidence).
This is a trap, not applied to skin: it lures host-seeking mosquitoes with CO2, heat, and scent and captures them, thinning the local biting population by roughly 20-40% where it is well placed and run continuously, with a single unit's real effect on the modest side. Its job is to thin a yard's mosquito population over time, and it works slowly as that population turns over. Results swing widely with placement, competing hosts (nearby people and pets pull mosquitoes away from the trap), and whether you run it all season. Scored on how well it does that job deployed as intended, with a light temper for the real-world swing in placement and competing hosts (lower confidence).
Evidence & honest claims25%29No published studies in our library directly support this product's active ingredients at their concentrations (base 20). Of 3 marketing claims audited: 2 strong, 1 moderate, 0 weak, 0 unsupported (+9).
No published studies in our library directly support this product's active ingredients at their concentrations (base 20). Of 3 marketing claims audited: 2 strong, 1 moderate, 0 weak, 0 unsupported (+9).
Safety15%75This is a standalone trap, not applied to skin, so there is no dermal exposure and no pesticide vapor or smoke to breathe. Because it lures mosquitoes with CO2, heat, and scent rather than zapping everything nearby, it is far more selective than a bug zapper and does not kill large numbers of harmless or beneficial insects. Place it away from where people gather so it draws mosquitoes toward the trap, not toward you.
This is a standalone trap, not applied to skin, so there is no dermal exposure and no pesticide vapor or smoke to breathe. Because it lures mosquitoes with CO2, heat, and scent rather than zapping everything nearby, it is far more selective than a bug zapper and does not kill large numbers of harmless or beneficial insects. Place it away from where people gather so it draws mosquitoes toward the trap, not toward you.
Transparency15%50This product is a device with no repellent formula to disclose, so it is neither credited nor penalized on ingredient transparency (neutral 50); its claims are audited under Evidence.
This product is a device with no repellent formula to disclose, so it is neither credited nor penalized on ingredient transparency (neutral 50); its claims are audited under Evidence.
Every pillar is scored from published rules. Read how we score.
Coverage & effectiveness
This is a trap: it lures host-seeking mosquitoes with CO2, heat, and scent and captures them, thinning the local biting population over time. It works slowly across a yard rather than protecting you on the spot, and results depend heavily on placement and running it continuously.
Mosquitoes
EstimatedLow- Coverage
- No proven range
- Fewer bites
- 20-40%
This band is a low-confidence estimate, because the BG-Sentinel 2 is validated as a surveillance and monitoring trap, not as a consumer bite-protection device. Mass trapping with several units can lower local Aedes numbers, but the reduction in how much a single yard gets bitten from one trap is modest and has not been well quantified in the literature. Real-world effect swings with placement, whether the BG-Lure and CO2 are used, mosquito species, and how many competing hosts are nearby. Treat any bite reduction as a slow, local population effect that works best deployed in numbers and integrated with removing standing water and using a repellent for on-the-spot protection.
Ingredient disclosure
This product is a device with no repellent formula to disclose, so it is neither credited nor penalized on ingredient transparency (neutral 50); its claims are audited under Evidence.
The manufacturer does not publish an ingredient list for this product.
Claims audit
What the marketing says, versus what the evidence supports.
“The most effective and widely used trap for adult Aedes surveillance, cited in over 300 scientific publications.”
EfficacyStrongWell supported; a de facto reference trap for Aedes monitoring.
“Mimics human convection currents and skin emanations to attract host-seeking mosquitoes.”
EfficacyStrongDocumented; catch rates rise substantially with the BG-Lure and CO2.
“An excellent tool for mosquito control.”
EfficacyModerateMass-trapping evidence is promising but mixed; depends on density, CO2 use, and integration with other measures.