Low Flow – 4140 Series

The 4140 Series represents the TSI solution dedicated to low-flow measurements, combining accuracy, response speed and reliability in a single instrument.

Model: 41401; 4140; 41403; 4143; 41433
Flow rate:
Range: 0.01-20 Std L/min
Accuracy — Air or O2: ±2% of reading or ±0.005 standard L/min (highest value applies)
Accuracy N₂: ±3% of reading or ±0.010 L/min, standard (highest value applies)
Response time: 4 ms to reach 63% of full scale value of flow rate
Units displayed on the LCD display: L/min, Std L/min, cm3/min, Std cm3/min
Overall dimensions (L × P × A):5” x 2” x 1.25” (127 mm x 49 mm x 32 mm)
Volume: Measuring range: 0.01 – 99.9 liters; Accuracy: ±2% of reading Volume measurement
Pressure: Measuring range: 50 – 199 kPa absolute; Accuracy: ±1 kPa; Response time: < 4 ms to reach 63% of the final value following a step change in pressure
Temperature: Measuring range: 0 – 50 °C; Accuracy: ±1 °C with flow rate greater than 1 standard L/min; Response time: < 75 ms to reach 63% of the final value following a step change in temperature
Outputs: Analog: 0–10 VDC (flow rate only), zero and full scale adjustable via RS232 or Digital: RS232
Power supply: DC input 7.5 VDC ±1.5 V, maximum absorption 300 mA