High Performance Liquid Chromatography (HPLC) – mV sensors are common in HPLC because often the system and pumps are calibrated as a whole and/or the system already has an on-board signal conditioner with trimming features to re-calibrate the equipment when needed. Also, mV sensors can be made as custom embedded units more easily, resulting in lower “dead volume”, which is important in HPLC applications to reduce cross-sample contamination.
Mass Flow Controllers (MFC) – Use of mV sensors in MFCs is common for similar reasons as the HPLC, with the additional need for fast response time. The fast response time of mV sensors in the MFC is vital to fine tune the amount of product that is allowed to flow into the process.
Scales and weighing equipment/hydraulic press and forming – mV sensors are used in hydraulic weighing and machine press applications to replace load cells. The mV output of the sensors is similar to the mV output of many load cells, allowing OEMs to minimize system redesign when upgrading from a load cell to a pressure sensor.
Higher ambient temperature applications – In applications such as super-heated steam, downhole drilling and MWD, or applications measuring pressure in a engine compartment of a moving or stationary engine, temperatures can climb to a range that is not compatible with ICs and ASICs. Because of the lack of ICs, mV units can generally be installed in locations that are simply too hot for amplified sensors, and the signal is transmitted to a remote signal conditioner. The CS-HTP high temperature pressure sensor and CS-DHP downhole pressure sensor are recommended for applications where high temperatures are a concern.
Heating, Ventilation, Air Conditioning, and Refrigeration (HVAC/R) – There are numerous applications in HVAC/R systems where pressure is measured. Often, there is a need for two separate sensors to be used to measure pressure in two spots to provide operators with the differential pressure reading. These PLCs are designed to accept two mV signals and report the differential pressure. The CS10 industrial pressure transducer with a millivolt output signal would be an ideal solution to handle this type of application.