Several versions of the of Near-Infrared spectroscopy probes were developed for EPSRC (EP/K020315/1). Conventional NIRS probes use 2 to 3 wavelengths in their sources. Additional wavelengths increase the accuracy of resolving multiple chromophores in the blood, however adding further wavelengths increases the size of source hence reduces the spatial accuracy of the measurement. As a result, a miniaturised multi-wavelength LED source was developed consisting of eight discrete wavelengths from 650nm to 950nm. The die attachment, wire-bonding, and encapsulation processes were performed in-house. The miniaturised near infrared spectroscopy tile consist of 2 sources and 4 detectors in an 30x30 mm2 square shaped encapsulation. Each tile is part of an array of tiles which are easily connected to create an imaging array. The tile has a silicone encapsulation for clinical use and benefits from novel soft silicone rods for better optical coupling and clearing hair. The optical sensitivity of detector is approximately 370 fW which means measuring pico-amps of electrical current on the head.