Magnetic Flow Meters
QTRD91 non-contact radar level meter principle
Ultrasonic Level Meters
Philemon Instrument produced some small diameter turbine flow meter for customer recently.
Those flow meters have DN4 and DN6 internal NPT thread.
The body material is SS304
Customer could customize internal and external thread, such as NPT, BSP.
Aso they could require the output for 4-20mA, Pulse, HART and RS485.
Pilemon Instrument could fit with customer's different inquiry.