  Zero-noise extrapolation (ZNE), a technique to estimate quantum circuit
expectation values through noise scaling and extrapolation, is well-studied in
the context of quantum computing. We examine the applicability of ZNE to the
field of quantum sensing. Focusing on the problem of DC magnetometry using the
Ramsey protocol, we show that the sensitivity (in the sense of the minimum
detectable signal) does not improve upon using ZNE in the slope detection
scheme. On the other hand, signals of sufficiently large magnitude can be
estimated more accurately. Our results are robust across various noise models
and design choices for the ZNE protocols, including both single-qubit and
multi-qubit entanglement-based sensing.
