Measurement with optoelectronic switches makes use of optical fibre and optical sensors for the precise detection of liquids in containers. This technology of the WIKA model OLS-2 features high accuracy and reliability, even under demanding conditions such as aggressive media or high pressures. Optoelectronic limit level switches are especially suited for use at very low (-253 °C) or extremely high (450 °C) process temperatures. As optical measuring instruments do not have moving parts, they are low-maintenance and durable, making them a efficient choice for level monitoring.