CoolLED pT-100

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The pT-100 is a compact and simple-to-use LED illumination system for transmitted light applications, including brightfield, darkfield, DIC, Dodt gradient contrast and phase contrast.

The system is available in four variants to bring the benefits of LEDs to modern laboratories. A broad white system provides a safer and convenient alternative to halogen by reducing harmful UV exposure to the eyes and is ideal for long hours spent at the microscope, while three narrow bandwidth options (525, 635 and 770 nm) optimise image quality through increased contrast. The pT-100 WHT and pT-100-770 nm are also available as variants with a 3 mm liquid light guide attachment, which is ideal for electrophysiology applications.


Light Source, Control Pod, Power Supply LED excitation at XXX nm, Power Supply and Plug.
*Direct Fit version includes microscope adapter
*Light guide version includes 1.5m long/3m, 3mm diameter liquid light guide.

Please confirm microscope make & model at Checkout
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Utilising the highly successful pE-100wht technology, we have further developed our LED solutions for Transmitted Light Applications with the pT-100 range.  Whether you’re looking for a broad white 100 W halogen replacement or want to optimise the quality of your images through the use of narrower spectrum wavelengths, the pT-100 can meet your needs.

CoolLED LED illumination technology offers a host of benefits over halogen systems, with instant on/off and irradiance control in 1% steps from the ergonomically designed manual control pod which can be positioned close at hand. Remote control is also available via a TTL trigger.

A true 100 W Halogen replacement: pT-100-WHT

Laboratories familiar with halogen lamps will find that CoolLED’s broad white achieves results which make the move to LEDs simple and apparent.  Colour temperature remains constant as irradiance is increased which makes colour balancing unnecessary and improves standardisation between sessions. Samples will appear identical even though irradiance could be up to five times greater.

In addition, the pT-100-WHT does not produce unwanted light in the UV which makes it safer and more comfortable, as risk of eye damage is significantly lower.

Narrow bandwidth solutions eliminate background noise

White light LED systems using a phosphored LED can be a source of background noise when used as a transmitted light source, which reduces image contrast. Narrow bandwidth illumination systems remove this background source to improve image quality and enhance analysis – even in thicker samples and applications requiring infrared light.

  • Higher contrast images: pT-100-525
    Narrow bandwidth at 525 nm is optimised for the spectral response of most scientific cameras and reduces background noise from a phosphored LED.
  • Revealing details in thick samples: pT-100-635
    Narrow bandwidth at 635 nm provides deeper penetration, which is excellent for revealing detail in thicker samples.
  • Infrared illumination of thicker samples: pT-100-770
    Narrow bandwidth at 770 nm provides deeper sample penetration techniques that require the use of infrared light.

Liquid Light Guide for added flexibility

The pT-100 WHT and pT-100-770 nm are also available with a 3 mm liquid light guide as an alternative to using a direct attachment adaptor, offering two main benefits:

  • Enhancing accuracy of sensitive electrophysiology experiments as remote positioning allows the Illumination Systems to be placed outside of a faraday cage, avoiding electrical interference.
  • Added compatibility with microscopes which only feature a liquid light guide input, the collimating optics being an integral part of the microscope.

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CoolLED pT-100 Brochure

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