Figure . Pulse sequence protocol for T S measurements at variable magnetic strength. Singlet order is excited via an M2S block on the C channel (a). After singlet order excitation the sample is shuttled (optional) to a desired magnetic field strength (b) and allowed to evolve for a time period τ evol (c). In case of a field cycling experiment the sample is shuttled back into the sweet spot of the detection magnet (d). After the free evolution period unwanted spin operator components are filtered out using a gradient based singlet filtration step (e). Signal detection is initialised by reconverting unobservable singlet order into observable magnetisation via the S2M sequence (f).