The Vehicle Loop Detector is mainly used to detect the existence and passing of vehicles;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 for vehicle detection Selectable Time: This feature sets the length of time that the relay will be energized for 1 Second or 0.5 Seconds; Relay : The Relay may be configured to energize on detection of a vehicle or when the vehicle leaves the loop Sensitivity Boost : This feature sets the undetected level to maximum sensitivity and is used to prevent loss of detection of high-bed vehicles Switch Selectable Sensibility: 4 sensitivity setting are available on the switches to allow flexibility in configuration;Switch Selectable Frequency: 4 frequency settings are available to prevent -talk between adjacent Filter Option: This option is used to a delay between detection of the vehicle and switching of the output relay . This relay is normally used to prevent detection of small or fast moving objects;Permanent Presence Option : This feature detection of the vehicle will be maintained when the vehicle is parked over the loop for extended periods. 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:/limited Sensitivity:Higher:0.02%/high:0.05%/low:0.1%/lower:0.5% Loop inductance: loop plus connection wiring: 50H to 1000H. perfect is 100H to 300H Loop connection wiring:200 long. The resistance is less than 80hm, at least20 per meter Relative humidity:Less than 90%No condensation Weight:283g Colour:black Material:Plastic + metal Package Contents: 1 x Vehicle Loop Detector Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.