STR4 Rotator without holder
STR4 Rotator without holder STR4 with STR4/1 holder for 15ml or test tubes STR4 with STR4/5 holder for microcentrifuge tubes

General Rotator, STR4

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Highly versatile - accepts a choice of 5 drums
Built in timer
Variable speed control 6 to 60rpm
Rotation speed: 6 to 60rpm
Dimensions (w x d x h): 650 x 250 x 250mm
Net weight: 6.4kg
Electrical Supply: 230V, 50Hz, 50W

The STR4 rotator drive unit is used in conjunction with a wide range of drums designed to take different sizes and types of vessels. The five drums are designed to give different mixing actions.
Speed of rotation is variable from 6 to 60rpm for a range of mixing applications.

For added convenience a built in analogue timer can be set from 10 to 60 minutes. Alternatively the unit can be set for continuous operation.

Drum, test-tube holder, STR4/1
Designed to rotate test-tubes in an end-over-end movement. Comprises a square metal drum which can accommodate a choice of plates fitted with tube clips. Up to four plates can be mounted on the drum. Easy fitting via a push button mechanism.

Drum, two platforms, STR4/2
This drum accepts 2 x 250ml conical flasks or reagent bottles for end over end mixing. The samples are securely held in place by a collar that fits around the neck of the flask or bottle and is secured by two washers.

Drum, figure 8, STR4/3
Drum holds the vessel at a 45° angle so it is rolled and turned end over end at the same time giving a vigorous figure of 8 mixing action. The sample container is retained by a strong Velcro strap. Accepts almost any container including reagent bottles, powder jars and paint tins up to 200mm in length and 120mm diameter.

Drum, bottle holder, STR4/4
This drum consists of a four segment Perspex® cradle. Each segment is fitted with a fully adjustable Velcro® strap to hold bottles and other containers up to 120mm diameter and up to 300mm in length.

Drum, microcentrifuge tube, STR4/5
Designed for thorough end over end mixing of 1.5ml microcentrifuge tubes. Four racks (included) can be held securely in the drum. Each rack can accommodate up to 60 microcentrifuge tubes, making this unit ideal for a high throughput laboratory.


Model Description
STR4 Rotator Drive
STR41 Drum to hold test tube clip plates
STR11 Clip plates for 12 x 12mm tubes (per pair)
STR12 Clip plates for 10 x 16mm tubes (per pair)
STR13 Clip plates for 8 x 19mm tubes (per pair)
STR14 Clip plates for 7 x 24mm tubes (per pair)
STR42 Drum with two platforms to hold flacks or bottles
STR43 Drum with figure 8 mixing action
STR44 Drum with four segment cradles holding up to four bottles
STR45 Drum with four segment cradles for four tube racks
SW21 Spare rack for 60 x 1.5ml tubes



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