TONO-PEN XL - Applanation Tonometer for rapid and accurate Glaucoma screening. Starter Pack includes: • Tono-Pen XL with carry case • 1 box of Ocu-Film Tip covers • 1 pack of Ocu Cel XL batteries • Instructional video and manual Technical Specifications • Weight: 64g (2.2oz) • Dimensions: 19cm x 5cm • Transducer: Micro strain gauge • Measurement range: 5-80mm Hg • Battery: 2 Ocu-CelT XL batteries Simple to use, hand held instrument providing intraocular pressure readings with accuracy comparable to the Goldmann Tonometer. The device utilises micro strain gauge technology and a 1.0mm transducer tip. The Tono Pen gently contracts the cornea and displays the average of 4 independent readings along with a statistical co-efficient. Leading EDGET recognition software ensures measurements are taken during applanation and ScanLockT tracking harvests data at a rate of 500 samples per second. Battery powered for complete portability and enough power for 1200 eyes. This item is a pack of 150 Ocu-FilmT tip covers which are used to reduce the risk of cross contamination.