I’m looking for a flow meter that can be used to monitor ammonia levels
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The higher the sensitivity, the better, as the amount of ammonia used in laboratories is generally very small； It can also withstand high pressure, as the pressure of the ammonia gas fed in can reach 1 MPa.
The recommended online mass flow meter is the Alicat Scientific PCD-50PSKG-100MBC-M16 thermal mass flow meter, with a measurement range of 0–100 SCCM. It can operate in high-pressure environments up to 1000 psi (69 Bar), and features very high accuracy and sensitivity. The Sierra Instruments Smart-Trak 50 thermal flow meter has a measurement range of 5 sccm to 1000 slpm. It features excellent rangeability, fast response times, and high precision, making it suitable for measuring the flow rate of high-pressure media such as ammonia. The Brooks Instrument SLA5800 is suitable for high-precision and highly reliable gas flow measurement. It features a highly sensitive thermal output, enabling online measurement from 0 to 200 standard liters per minute.