The AccuRange 4000 laser rangefinder is Acuity's longest distance measuring tool. Employing time-of-flight measuring principles, the rangefinder can accurately gage distances up to 54 feet (16.45 m).  Non-contact measurement is made simple with the three models within the AR4000 rangefinder series. All models are compact and durable, residing in a NEMA-4 enclosure for challenging industrial environments.