The Vehicle Loop Detector is mainly used to detect the existence and passing of vehiclesReset 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 SecondsPulse Relay Selection: The Pulse Relay may be configured to energize on detection of a vehicle or when the vehicle leaves the loopSensitivity Boost : This feature sets the undetected level to maximum sensitivity and is used to prevent loss of detection of high-bed vehiclesSwitch Selectable Sensibility: 4 sensitivity setting are available on the switches to allow flexibility in configurationSwitch 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 objectsPermanent 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: 220VACPower: 4.5WOutput relays:240V/5AOperating temperature:-20~65CStorage temperature:-40~85CFrequency range:20 kHz to 170 kHzTemperature compensation:50C/ hReaction time:10msSignal holding time:Unlimited/limitedSensitivityHigher: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 300HLoop connection wiring:200 meters long. The total resistance is less than 80hm, twisted at least 20 times per meterRelative humidity:Less than 90%No condensationColour:blackMaterial:plastic+metalPackage Contents:1 x Vehicle Loop DetectorOnly 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.