The CI-SM80x and CI-SM81x series thermal mass flow meters offer advanced, real-time measurement of standard flow, mass flow, gas consumption, and temperature all in one compact, high-performance device. Designed for accuracy and efficiency, they are ideal for a wide range of industrial applications, especially where stable signal and long-term reliability are essential. With no moving parts and full-digital signal processing technology, these meters eliminate the issues of zero-point drift and mechanical wear. Replacing traditional analog bridge circuits, the digital architecture delivers enhanced measuring precision and a significantly broader range. Offering an ultra-low measuring threshold down to 0.1 Nm/s and a turndown ratio of up to 1:2500, the CI-SM80x/81x models outperform most conventional flow meters on the market. They are perfectly suited for detecting highly variable gas flows, low-flow bypass lines, and precise consumption of individual equipment. Equipped with innovative self-diagnosis capabilities, these meters continuously monitor sensor conditions in real time. They can detect contamination and actively protect the sensor from overheating—ensuring long-term stability and operational safety.

Feature:
Ultra-low Flow Detection: Measures flow as low as 0.1 Nm/s, suitable for minimal gas flow applications；
High Turndown Ratio: Covers a wide range with a 1:2500 turndown ratio (0.1 Nm/s to 250 Nm/s);
Advanced Digital Signal Processing: Provides high accuracy and long-term stability while eliminating zero-point drift;
No pressure or Temperature Compensation Needed: Direct thermal measurement includes built-in temperature detection;
30+ Point Factory Calibration: Corrects nonlinearities for improved thermal measurement accuracy;
Non-intrusive, Pressurized Installation: Insert-type model can be installed without shutdown using a ½” ball valve, minimizing pressure drop;
Electrically Isolated Design: Fully isolated internal structure reduces external electrical interference;
1.5″ Capacitive Touch LCD: Offers a wide viewing angle and intuitive display interface;
Standard Communication Interface: Supports Modbus RTU (RS485) with 4–20 mA current and pulse outputs;
Insert Type CI-SM80x: Fits pipe sizes DN20 to DN1000, supports under-pressure installation;
Inline Type CI-SM81x: Pipe sizes: DN15, DN20, DN32, DN40, DN50, DN65, DN80. Connection Types: R-type thread, Flange EN1092-1, ANSI/B16.5