{"product_id":"single-channel-inductive-loop-vehicle-detector-barrier-gate","title":"Single Channel Inductive Loop Vehicle Detector – Barrier Gate","description":"\n\u003ch2\u003eAsia-Teco Single Channel Inductive Loop Vehicle Detector (Model 120B)\u003c\/h2\u003e\n\u003cp\u003eUpgrade your parking lot, driveway gate, or barrier system with the \u003cstrong\u003eAsia-Teco Model 120B Single Channel Loop Vehicle Detector\u003c\/strong\u003e. Engineered for reliable, traffic-inductive detection, this CE-certified unit integrates seamlessly with automatic gate openers, barrier arms, and access control systems — including Northtech-compatible setups. Whether you're managing a commercial parking facility or a residential gated entry, the 120B delivers fast, accurate vehicle sensing every time.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose the Asia-Teco 120B Loop Detector?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Voltage Compatibility:\u003c\/strong\u003e Operates on 230V AC, 115V AC, 24V DC\/AC, or 12V DC\/AC — making it adaptable to virtually any installation environment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Temperature Range:\u003c\/strong\u003e Performs reliably from -20°C to +65°C, so it works year-round in demanding outdoor conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Sensitivity:\u003c\/strong\u003e Four sensitivity increments let you fine-tune detection to suit your specific loop geometry and vehicle types.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Reaction Time:\u003c\/strong\u003e 10ms response ensures the gate or barrier triggers without perceptible delay.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelf-Healing Fault Detection:\u003c\/strong\u003e The unit monitors loop health continuously; if a recoverable fault occurs, the detector keeps operating and signals the issue via LED indicator.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCE Certified:\u003c\/strong\u003e Meets European conformity standards for safety and electromagnetic compatibility.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Housing:\u003c\/strong\u003e Slim 78 × 40 × 108 mm form factor fits easily inside a weatherproof control cabinet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eA wire loop is embedded in the pavement surface beneath the gate or barrier. When a vehicle passes over the loop, it changes the loop's inductance. The 120B detector senses this change within 10ms and triggers its output relay, signaling the gate or barrier controller to open. The green Channel LED illuminates whenever a vehicle is detected, and the red Power LED remains on as long as the unit is energized. During the auto-tuning sequence at startup, both LEDs light briefly (~2 seconds) before the system is ready for operation.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120B\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e230V AC \/ 115V AC \/ 24V DC-AC \/ 12V DC-AC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage Tolerance (AC)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e+10% \/ -15%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage Tolerance (DC)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±15%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.5 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Relays\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e240V \/ 5A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-20°C to +65°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 kHz to 170 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReaction Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSignal Hold Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnlimited (max 10 min when loop is permanently covered)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAdjustable in 4 increments\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLoop Inductance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50µH – 1000µH (ideal: 100µH – 300µH)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Loop Wire Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 metres, twisted ≥20 times per metre\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e78 × 40 × 108 mm (L × W × H)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSecurity Mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFail Secure\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCE\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eInstallation Tips\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMount the detector in a weatherproof location as close to the inductive loop as possible.\u003c\/li\u003e\n  \u003cli\u003eKeep the unit away from heat sources and maintain at least 10 mm clearance from surrounding devices or enclosure walls.\u003c\/li\u003e\n  \u003cli\u003eLoop connection wiring must not exceed 20 metres and must be twisted a minimum of 20 times per metre to minimize interference.\u003c\/li\u003e\n  \u003cli\u003eIdeal loop inductance is 100µH to 300µH for optimal detection performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eThe Asia-Teco 120B is compatible with Northtech barrier gates and most single-channel automatic gate opener systems that accept inductive loop detector signals via relay output.\u003c\/p\u003e\n\n\u003cp\u003eFor general electrical safety guidelines when installing access-control and gate systems, refer to the U.S. Consumer Product Safety Commission (CPSC) and \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA's Electrical Safety resources\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is the Asia-Teco 120B loop vehicle detector compatible with Northtech barrier gate systems?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The 120B is specifically noted as compatible with Northtech parking lot barrier gate systems, as well as most other automatic gate openers that accept a standard relay-based inductive loop detector signal.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What voltage options does the Model 120B single channel loop detector support?\u003c\/h4\u003e\n\u003cp\u003eA: The 120B supports multiple supply voltages — 230V AC, 115V AC, 24V DC\/AC, and 12V DC\/AC. Check the label on your specific unit to confirm which voltage it is configured for before installation.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I know if the loop detector has detected a vehicle or if there is a fault?\u003c\/h4\u003e\n\u003cp\u003eA: The unit features two LED indicators. The green Channel LED illuminates whenever a vehicle is detected over the inductive loop. If a fault is present, the Channel LED will flash. The red Power LED remains constantly on whenever the unit is powered. During startup tuning (approximately 2 seconds), both LEDs light simultaneously.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the maximum loop wire length for this vehicle loop detector?\u003c\/h4\u003e\n\u003cp\u003eA: The connection wiring from the inductive loop to the detector must not exceed 20 metres. The wire must also be twisted at least 20 times per metre to minimize electromagnetic interference and ensure reliable detection.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this loop detector be used outdoors in extreme temperatures?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The Asia-Teco 120B has an operating temperature range of -20°C to +65°C, making it suitable for year-round outdoor use in most climates. For storage, the unit can withstand temperatures from -40°C to +85°C.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is the Asia-Teco 120B loop vehicle detector compatible with Northtech barrier gate systems?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The 120B is specifically noted as compatible with Northtech parking lot barrier gate systems, as well as most other automatic gate openers that accept a standard relay-based inductive loop detector signal.\"}}, {\"@type\": \"Question\", \"name\": \"What voltage options does the Model 120B single channel loop detector support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The 120B supports multiple supply voltages — 230V AC, 115V AC, 24V DC\/AC, and 12V DC\/AC. 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