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Benchmark TC 9639 Gradient Thermal Cycler
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Frequently asked questions
What does the gradient function on a thermal cycler do?
It applies a controlled temperature differential across the block, so one run tests a series of annealing temperatures side by side — the fastest way to optimize a new primer pair. Benchmark's TC 9639, for example, spans a 1–30 °C differential across the block.
Why do thermal cyclers need a heated lid?
The lid keeps the air above the reaction hotter than the liquid, so evaporating water condenses back into the mix rather than onto the tube cap. Without it, small-volume reactions lose water, concentrations shift, and yields drop — the problem labs once solved with mineral-oil overlays.
Which specifications matter most when choosing a PCR machine?
Block format and flexibility (96- or 384-well; tubes, strips, and plates), maximum ramp rate, temperature accuracy and uniformity (the ±0.2 °C class), gradient capability, and program memory. High-throughput or regulated settings should also weigh lid-pressure consistency, connectivity, and run logging.
What is a water-bath thermal cycler?
Instead of heating and cooling a Peltier block, systems like LGC Biosearch's Hydrocycler2 move sealed plates between temperature-controlled water baths, eliminating ramp time entirely — cycling runs roughly 40% faster. The approach suits ultra-high-throughput genotyping far more than routine benchtop PCR.
Where can I buy a thermal cycler in Israel?
Benchmark Scientific and LGC Biosearch PCR instruments reach Israeli labs through Danyel Biotech, the official Israeli distributor of both brands. Our team matches block format and throughput to your protocols, and provides fast quotes with local service.

