①. The Vehicle Loop Detector is mainly used to detect the existence and passing of vehicles; ②. Reset Switch: The reset switch enables the detector to be manually reset during commissioning and testing. This results in the detector re-tuning the sensing loop and becoming ready for vehicle detection; ③. Selectable Pulse Time: This feature sets the length of time that the pulse relay be energized for 1 Second or 0.5 Seconds; ④. Pulse Relay Selection: The Pulse Relay may be configured to energize on detection of a vehicle or when the vehicle leaves the loop; ⑤. Sensitivity Boost: This feature sets the undetected level to maximum sensitivity and is used to prevent loss of detection of high-bed vehicles; ⑥. Switch Selectable Sensibility: 4 sensitivity setting are available on the switches to allow flexibility in configuration; ⑦. Switch Selectable Frequency: 4 frequency settings are available to prevent talk between adjacent loops; ⑧. Filter Option: This option is used to provide a delay between detection of the vehicle and switching of the output relay. This relay is normally used to prevent false detection of small or fast moving objects; ⑨. Permanent Presence Option: This feature detection of the vehicle be maintained when the vehicle is parked over the loop for extended periods; ⑩. Specifications: Supply voltage: 220V AC; Power: 4.5VA; Output relays: 240V/5A; Operating temperature: -20~65 Celsius; Storage temperature: -40~85 Celsius; Frequency range: 20 kHz to 170 kHz; Temperature compensation: 50 Celsius/ h; Reaction time: 10ms; Signal holding time: Unlimited/limited; Sensitivity: Higher: 0.02%/high: 0.05%/low: 0.1%/lower: 0.5%; Loop inductance: Total loop plus connection wiring: 50μH to 1000μH, 100μH to 300μH is preferred; Loop connection wiring: 200 meters long. The total resistance is less than 80hm, twisted at least 20 times per meter; Relative humidity: Less than 90% No condensation.