Which GPM rate of flow can the low range differential pressure transmitter sense and indicate on the return venturi in the Type 3 system?

In a Type 3 system, the low range differential pressure transmitter is designed to measure the flow rate of liquids through a venturi flow meter with precision in its specified operational range. The correct range of flow for this type of transmitter is critical for ensuring that it accurately senses and indicates differential pressure changes, which correlate directly to flow rates.

Selecting a flow range of 0-100 GPM ensures that the transmitter can effectively capture the lower flow scenarios typical in a Type 3 system. It allows for finer measurements and improved accuracy within this operational limit. This range provides an optimal balance between performance and the typical operational characteristics of the system, thus enabling reliable monitoring and control of water or fuel flows.

The other flow ranges specified, while they cover greater volumes, may not be appropriate for the sensitivity and accuracy required for the Type 3 system's operations. Higher ranges might lead to reduced accuracy at lower flow rates, which is where this specific application often operates. Consequently, the 0-100 GPM range is the most suitable choice for effective monitoring and operational control in this context.