Alicat Whisper MW Series Low Pressure Drop Mass Flow Meters

Alicat mass flow meters – Tezgen, Alicat distributor in Turkey

Overview

Whisper™ MW series meters

Low pressure drop mass flow meters with laminar differential pressure technology

Low pressure drop mass flow meters are ideal for systems with limited source pressure. Whisper instruments create minimal pressure drop (as low as 0.07 PSID).

98 standard preloaded gas options – switch easily without compromising accuracy
Measures mass flow, volumetric flow, temperature and pressure
Instant warm-up (<1 second)
Measurement range 0.01–100% (10,000:1 turndown)
Laminar DP (differential pressure) mass flow measurement technology

Alicat Whisper MW Series Low Pressure Drop Mass Flow Meters

For most low-pressure flow measurements
0.5 SCCM – 1,000 SLPM options
60 PSIA maximum operating pressure
± 0.6% of reading accuracy
Repeatability ± (0.1% of reading + 0.02% of full scale)

Technical specifications

Parameter
Mass flow accuracy	± 0.8% of reading and ± 0.2% of full scale
Flow repeatability (2σ)	± (0.2% of reading + 0.02% of full scale)
Pressure accuracy	Available for models ≥ 5 SCCM
Flow measurement range	0.01–100% of full scale
Operating pressure	11.5–60 PSIA
Pressure sensitivity	Mass flow zero and span shift: ± (0.08% of reading + 0.02% of full scale) per atm from tare pressure
Temperature sensitivity	Mass flow zero and span shift: 0.03% of full scale per °C from 25 °C
Temperature accuracy	± 0.75 °C
Operating temperature range	-10…60 °C
Total volumetric uncertainty	± 0.5% of reading (additional uncertainty)
Sensor response time	< 1 ms
Typical indicator response time	127 ms (user adjustable)
Typical warm-up time	< 1 s