The PTR Series are compact variable-speed, variable-angle vertical rotators providing vertical rotation, reciprocation and vibration. 360° vertical rotation - creates long wave motion for mixing large particles Reciprocation - creates long and medium wave motion for medium and large particles Vibration - creates short wave motion for mixing for small particles Pause All actions may be set for continuous or timed operation, and individual phases may be linked together for absolute flexibility. 360° vertical rotation, reciprocation and vibration can be set for continuous or timed operation, or linked together in different combinations to ensure optimum mixing conditions for your application Choice of two models - PTR-35 or PTR-60 - with different speeds and microtube capacities Vertical rotation speed: 1 to 100 rpm Reciprocal rotation: 1 to 90° turning angle Vibration: programmable in a burst of 1 to 5 seconds Very easy to operate, with simple set-up of multi-segment programs via push buttons and the 2-line LCD status display, fully programmable sequence of functions, including pause Capacity of up to 26 (PTR-35), 48 (PTR-60) microtubes and a maximum rotating speed of up to 100 rpm. Optional accessory platform for accommodating tubes of different diameters Reliable and extremely quiet motor produces regulated and reproducible rotation throughout the speed range Compact with a low profile and small footprint - fits neatly into the workspace Suitable to be used in cold rooms and incubators