TBTTQ-1J Retroreflectometer for road studs is portable device which used to measure the coefficient of luminous intensity RI of RRPM (Raised Pavement Markers or road studs).
ASTM E1696 (0.2° and 1.0°), EN1463 (0.33° and 1.0°)
1.Equip with imported sensor;
2.Touch screen real-time display temperature and humidity;
3.Observation angle automatically matches the illumination angle;
4.One device can meet different standards’ required test angles;
5.English software or customized language are available.