Intrinsic safety is a diificult one as the pump will be approved and have gained CE mark under the medical directive, and not under the ATEX directive. It is very unlikely that they have tested for this. I don't think that there would be any pproblem, but it is all down o the hardware in the device.
Some sites, such as oil refineries insist on intrinscially safe devices..and for safety reasons (understandably). I had never thought aboutthis. If it is an issue, I would go back to the manufacturere, and ask if they can commision some testing. SIRA wwould be able to do thetesting for them I believe.