P. L. Tandon & Co. Supplies V.D.R.L. Rotator. P. L. Tandon & Co. Is an ISO 9001 2000 certified co. And manufactures laboratory instruments. The V.D.R.L. Rotator is made to operate blood-grouping tests, V.D.R.L. Tests, and different agglutination tests or to mix solutions in flasks, small bottles or beakers. It is available without timer with fixed speed for 180 RPM. The V.D.R.L. Rotator is designed with covered metal platform size 13 inches x 13 inches. It is offered with holder clamp, spring, and indicator lamp and On/Off switch.