An Invaluable Tool for Water Analysis

This comprehensive resource covers the full range of Thermo Scientific pH electrode families including the best-selling ROSS Ultra®, ROSS®, and PerpHect® electrodes and the environmentally friendly “green” electrodes. All the information you need to operate, maintain, and troubleshoot your pH electrodes.
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(1MB pdf)

Ultrasonic Fractionation
of Cells in Microplates

Ultrasonic processors are now widely used in laboratories for a variety of applications. The use of 4-element probes increased productivity and improved repeatability over single probes. The recent addition of 8- and 24-element probes meets the high-throughput requirement of genomics and proteomics laboratories. Read how these time-saving multi-element probes will favorably impact your workload while ensuring uniform and predictable results.
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Take the challenge,
see if you’re right...

No flow? No problem!

Challenge: Fred from ABC Corp. is pumping a chemically aggressive laquer at low flow rates and nominal temperatures. He ordered a Masterflex® L/S® compact drive together with an L/S Easy-Load® pump head which accepts Masterflex Precision pump tubing. He chose to use a Viton® formulation of tubing because it offers excellent chemical resistance.

Ready to begin pumping, Fred noticed that there was no flow and the pump head was unable to start rotating. If Fred removed the tubing from the pump head, the rotor assembly seemed to rotate freely. Fred’s problem is:

1. The laquer is too viscous for L/S Precision pump tubing. His application requires L/S High-performance Precision tubing—which features a thicker wall and better suction lift—and a different pump head.
2. Defective pump head. Rollers turn freely with no tubing installed.
3. Starting torque using an L/S Easy-Load pump head requires 35 oz-in for Viton tubing. The L/S compact drive he is using produces a maximum torque of only 25 oz-in.

What You Should Know about Temperature Control and Hot Pates

In general, the better the temperature controller is in your hot plate, the smaller the temperature cycle and the temperature overshoot or undershoot values. Learn why all EchoTherm® digital hot plates and stirring hot plates feature PID temperature control.
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