Quick view RS50 White Reflectance Standard $455.00 RS50 is a 50mm diameter white reflectance standard made of Halon. It is used to take reference measurements using the R600 Reflectance Probe. This white standard will reflect >97% of the light from 300-1700nm. See more Spectroscopy... Qty in Cart: 0 Quantity ( in cart): Decrease Quantity: Increase Quantity: Price: $455.00 Subtotal: Add to Cart