Oil leakage detection and low flow monitoring The ability to quickly detect leakage from a remotely controlled, autonomously operated machine, transformer, compressor or similar ist-ag.com/biosensors can avoid unplanned and costly repairs. An OOL module from IST AG enables such preventive maintenance, makes it feasible to plan, and protects against unscheduled downtime. www.ist-ag.com FLOW MODULES

Contents 1.0 Motivation Drips, leaks, seeps, and weeps all describe oil used for lubrication and cooling, passing excessively through sealings, e.g. in axle- or gearboxes. Bearings wind turbines, trains and other machines with common cold starts and temperature change exposure are continuously stressed to their limit. Measurement Results Overlooking warning signs on remotely, autonomously operated machines, transformers or compressors can lead to severe complications. The main reason for installing leakage detection sensors is to determine whether the oil leakage is severe enough to warrant immediate...

2.0 Technology IST AG’s Out-Of-Liquid (OOL) thermal mass flow sensor technology is designed to measure low flow rates of corrosive liquids. The OOL sensor design was optimized for reliability with platinum thinfilm elements immovably positioned on the outside of a stainlesssteel tube. Operated in constant temperature anemometry (CTA) mode, the power required to drive the sensor is directly related to the liquid flow, as convective thermal transport is evaluated. With a design adaptation facilitating decoupling the sensor elements, the flow range of the standard OOL flow module (0.1 to 20 kg/h)...

4.0 Outlook The OOL flow sensors have been characterized and successfully industrialized for high volume production. A signal evaluation board with a standardized digital I2C bus interface has been developed. Evaluation modules for application tests are available upon request. IST AG offers OEM sensor solutions such as assemblies with custom fluidic, electric, and mechanical interfaces. These assemblies can be integrated into measurement devices, actuators, or as auxiliary monitoring components. March 2023 | Subject to change without notice The flow characteristics are shown in figure 3 as a...