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 detection Selectable 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 -talk between adjacent 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 Permanent Presence Option : This feature detection of the vehicle will be maintained when the vehicle is parked over the loop for extended periods. Model: PD132 (English version) Power Voltage: 220VAC Power: 4.5W Output relays:240V/5A Operating temperature:-20~65C Storage temperature:-40~85C Frequency range:20 kHz to 170 kHz Temperature compensation:50C/ h Reaction time:10ms Signal holding time:Unlimited/limited SensitivityHigher:0.02%, high:0.05%, low:0.1%, lower:0.5% Loop inductance:Total loop plus connection wiring:50H to 1000H. perfect is 100H to 300H 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 Colour:black Material:plastic+metal Package Contents: 1 x Vehicle Loop Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.