The IR (infrared) light version of the T10 turbidity meter uses an emitter and detector specifically at 860nm. The WL (white light) version of the meter uses a tungsten lamp and a photodiode detector, both of which operate within the full visible light spectrum. The photodiode detector has a spectral peak response between 400-600nm.
The T10 turbidity meters are designed specifically to conform to the international requirements for reporting turbidity measurements. The IR version conforms to ISO 7027 and EN27027. The WL version conforms to APHA SM 2130B, ASTM D1889, and EPA 180.1. Both can be used on the same system if conforming to multiple standards is required.
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