The objectives of this study are (a) to review the current technologies, (b) to examine comparative costing data for six selected representative devices, and (c) to discuss the clinical factors related to selection of devices for intermittent temperature measurement. Financial estimates indicate that mercury-in-glass thermometers are the cheapest devices. Compact electronic and chemical (phase change) thermometers are cheaper alternatives than multi-patient contact thermometers requiring probe covers and infrared sensing models, which are commonly adopted in hospitals and clinical practice. However, time required to obtain readings will influence overall costs. Rigorous independent clinical research studies are now needed to establish which of these alternative technologies are 'fit for purpose'. As a minimum they should offer comparable clinical accuracy and reliability to mercury-in-glass and be suitable for most clinical measurement situations. Furthermore any additional costs should bring demonstrable benefits to the patient, user and healthcare system.