This Dataset is for the paper: "A miniaturized 4 K platform for superconducting infrared photon counting detectors" by: Nathan R. Gemmell1, Matthew Hills2, Tom Bradshaw2, Tom Rawlings2, Ben Green2, Robert M. Heath1, Konstantinos Tsimvrakidis1, Sergiy Dobrovolskiy4, Val Zwiller3,4, Sander N. Dorenbos4, Martin Crook2, Robert H. Hadfield1 1.School of Engineering, University of Glasgow, G12 8QQ, Glasgow, United Kingdom 2.STFC Rutherford Appleton Laboratory, Harwell, OX11 0QX, United Kingdom 3.Department of Applied Physics, Royal Institute of Technology (KTH), SE-106 91 Stockholm, Sweden. 4.Single Quantum B.V., 2628 CH Delft, The Netherlands The four datasets presented here represent the data contained in figures 1-4 in the letter. The files are accessible with Origin software. The experimental protocol is outlined in the letter.