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Choosing the Perfect Bath Fluid


Much like the oil & gasoline for a vehicle, the fluid for a lab bath or chilling unit is key to its continued operation. Listed below are the key factors in choosing the perfect bath fluid.


Temperature range

This factor is the most obvious: your bath fluid's operating temperature range should be entirely within the temperatures reached during your application.



Whether you're using a bath or other temperature control equipment, your unit is compatible and not-so-compatible with different compounds. Always be sure that the bath fluid is compatible with your equipment.

The easiest way to do this is to simply check the manufacturer's documentation. Reputable brands produce documentation that can guide you towards compatible fluids.



Particularly viscous fluid can wreak havoc on an average pump. While many fluids list a maximum temperature, their room temperature viscosity may exceed the pump's capability. You should your pump's specifications against the fluid's standing viscosity to ensure safe operation.



Automobile coolant may seem like a no-brainer for a temperature control unit, but they aren't compatible! Basic coolants contain anti-corrosive compounds that are too powerful for sensitive temperature control equipment, causing gradual and enduring damage.

Most manufacturers offer water / glycol fluids that can keep your unit safe. For example, Julabo offers Thermal EG (ethylene glycol) fluid designed to work with its PURA and CORIO water baths.


Getting help

If you'd like (free!) advice and support regarding fluid for your lab water bath, we're here to help. Reach out to us at hello@growinglabs.com or 1-833-476-9420. We've provided supplies & equipment to hundreds of laboratories of all sizes.