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<br> 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<br> Sensitivity Boost : This feature sets the undetected level to maximum sensitivity and is used to prevent loss of detection of high-bed vehicles<br> 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<br> 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.<br> Specifications:<br> Supply voltage:220V AC<br> Power:4.5VA<br> Output relays:240V/5A<br> Operating temperature:-20~65 Celsius<br> Storage temperature:-40~85 Celsius<br> Frequency range:20 kHz to 170 kHz<br> Temperature compensation:50 Celsius/ h<br> Reaction time:10ms<br> Signal holding time:/limited<br> Sensitivity:Higher:0.02%/high:0.05%/low:0.1%/lower:0.5%<br> Loop inductance: loop plus connection wiring:<br> 50H to 1000H. perfect is 100H to 300H<br> Loop connection wiring:200 long. The resistance is less than 80hm, at least20 per meter<br> Relative humidity:Less than 90%No condensation<br> Weight:283g<br> Colour:black<br> Material:Plastic + metal<br> Package Contents:<br> 1 x Vehicle Loop Detector<br> Only the above package content, other are not included.<br> 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.