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Description
Pololu QTR-HD-25A Reflectance Sensor Array: 25-Channel, 4mm Pitch, Analog Output
Detects reflectance changes with 25 sensors
Operates within 2.9 V to 5 V voltage range
Features dimmable brightness control
Optimizes performance at 5 mm sensing distance
Measures 101.0 × 16.5 × 2.5 mm
The Pololu QTR-HD-25A Reflectance Sensor Array: 25-Channel, 4mm Pitch, Analog Output is an advanced tool designed for precise detection of reflectance changes, such as those required in line detection applications. This sensor array comprises 25 infrared LED and phototransistor pairs, which are adept at identifying variations in surface reflectivity. The device operates efficiently within a voltage range of 2.9 V to 5 V, providing flexibility in various electronic setups.
The sensor array features dimmable brightness control, which functions independently of the supply voltage, allowing for tailored adjustments to suit specific detection needs. Additionally, it offers separate controls for odd and even emitters, enhancing its adaptability in diverse environments. The absence of lenses in this model maintains the traditional QTR sensor design, ensuring reliable performance.
The sensor's optimal performance is achieved at a sensing distance of approximately 5 mm, with the capability to detect high-reflectance objects up to a distance of 50 mm. This makes it suitable for applications requiring close-range detection with high contrast between light and dark readings.
If you are not satisfied for whatever reason with a Product you bought on the Site, it is possible to return it for refund within 30 days from the date you received it unless otherwise indicated in the Product listing. You must first advise the Vendor associated with your order in your account to obtain a return authorization (‘’RA’’) number before returning a Product. (‘’RA’’) numbers are valid for 30 days, within which time the returned Products should be received by the Vendor. No returns will be accepted without having previously obtained an (‘’RA’’) number. The Product must then be returned in its original packaging (in perfect condition for resale) with its receipt and your (‘’RA’’) number. Reimbursement will be denied for any Products which do not conform to the above mentioned conditions.
Build-it-yourself Robot Parts are not refundable once assembled. Robots & Kits requiring assembly or soldering are also not refundable once assembled, soldered or modified in any way. All sales of robotic software and apps are final and cannot be refunded or exchanged. Returns are not accepted on special orders and clearance items except when they are found defective, in which case the Product may be repaired or replaced at the Vendor’s discretion. 20% Restocking fees may apply if you are returning a large quantity of the same Product that was ordered specifically for you from the manufacturer.
Please note that all items will be reimbursed within 7 to 14 days of receiving the Product (shipping fees excluded). You must also cover the cost of returning the Product. Shipping fees will only be refunded if the return is a result of a shipping error on our part. Cleaning fees of USD 100 may also be charged if a domestic robot is returned and has not been properly cleaned.
