Features: 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 ready for vehicle detectionSelectable Pulse Time: This feature sets the length of time that the pulse relay will be energized for 1 Second or 0.5 Seconds Pulse Relay Selection: The Pulse 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 cross-talk between adjacent loopsFilter 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 objectsSpecifications: Supply voltage220VACPower4.5VAOutput relays240V/5AOperating temperature-20~65CStorage temperature-40~85CFrequency range20 kHz to 170 kHzTemperature compensation50C/ hReaction time10msSignal holding timeUnlimited/limitedSensitivityHigher:0.02%high:0.05%low:0.1%lower:0.5%Loop inductanceTotal loop plus connection wiring:50H to 1000H. Ideal is 100H to 300HLoop connection wiring200 meters long. The total resistance is less than 80hm, twisted at least 20 times per meterRelative humidity<90%No condensationWeight283gPackage included: 1 x Vehicle Loop Detector 1 x Manual Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering..