TSI Inc.SHOREVIEW, Minn., April 29, 2016 — TSI Inc. has announced user-serviceable photometer Model 8177, designed for the 8127 and 8130 filter tester models. The photometers can be cleaned by a trained technician on site in less than one hour, minimizing downtime, reducing the cost of ownership and resulting in more profitable filter testing. The new upstream and downstream photometers housed in the photometer box 8177 can be retrofitted to either the 8127 and 8130 filter tester. 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