Opto Circuits (India) Ltd produces a range of medical devices including [1] pulse oximeters to measure blood oxygen levels and pulse rate used in operating theaters and ICUs, [2] multiparameter monitors to monitor vital signs such as ECG, blood pressure, temperature and oxygen levels in ICUs, and [3] pulse oximeter sensors that interface between patients and monitoring systems, including disposable and reusable sensors. The company also produces [4] digital thermometers as an alternative to mercury thermometers, [5] cholesterol monitors to measure cholesterol levels, [6] fluid warmers to warm IV fluids, and [7] coronary stents to clear blocked arteries.