ISO 17025 certification requirements of support equipment

Does anyone know if ISO 17025 has an exemption for the re-certification of certain measurement equipment, e.g. digital timers, class A volumetric pipettes, glass thermometers? 
Management is asking us to purchase certified replacements because the cost of certifying the item is generally 3x the cost of buying a new one.
The problem is that I will eventually have a drawer full of good but not certified timers, thermometers, etc.