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AirLine™ AL-40- Inline Thermal Mass Flow Meter

Series AL-40 AirLine ™ flow meters offer a lower cost option for many air flow applications with the high value associated with all of EPI’s flow measurement instrumentation.





Series AL-40 AirLine Flow meters

Low Cost / High Value

Eldridge Products, Inc. (EPI) AirLine Series AL40 Inline is the all new series of thermal mass flow meters designed to aid in the measurement and management of compressed air systems’ consumption and usage.  Low cost and offered in sizes from ¼” NPT to 2” NPT with extremely fast response time.  Get yours today and rest assured with the accurate and reliable capability of the AirLine Series thermal mass flow meter from Eldridge Products, Inc.

The AirLine Series AL40 Flow Meters are compact In-Line style instruments.  The CNC machined and anodized 6061-T6 aluminum flow section is specified to match the user’s flow conduit and is then plumbed directly into the process line. The Series AL40 features a thermal glass coated ceramic sensor for the ultimate in fast response time.  The sensing elements are mounted directly in the flow section for exposure to the process gas.  All electronics are mounted integrally on the flow section in an aluminum NEMA 4X (IP66) enclosure.


Approvals: CE Mark

Transmitter Operating Temperature: 0° – 130°F ( -18 ° – 55°C)

TemperatureCompensationStandard: 0°−150°F(−18°−66°C)

Inline Flow Meter:150 PSIG

Communication: RS-232C, RS485 Modbus RTU

Display: Optional 2-Line, 16 character per line, backlit LCD

Wetted Materials:  6061 -T6 Aluminum

Standard Temperature & Pressure (STP): 70°F & 29.91” Hg (Air = 0.075 L bs. / FT )

Enclosure Rating: NEMA 4X (IP66)

Accuracy (Including Linearity): ± 3% Full Scale

Repeatability: ± 0.5% of Full Scale

Linear Signal Output: 0 – 5 or 0 – 10 VDC, 4 – 20 mA, RS485 Modbus RTU
Optional: 0 – 1 kHz (Proportional to ow for total / counter)

Sensor Response Time: 0.2 Second

Turndown Ratio: 100:1 (Not less than 15 SCFM / FT2 )

Input Power Requirements: 18 VDC or 24VDC @ 250mA

Power Supply: 24VDC out optional 115 VAC 50/60 Hz 100mA Wart Wall
24VAC out optional 230 VAC 50/60 Hz 50mA Wart Wall

Transmitter Power Requirements: 5Watts or less

Relay Output: 1 Amp @ 30VDC (33W)


NOTE: Specifications subject to change without notice.

Product Details

Below is the standard 2″ configuration.We offer sizes from 1/4″ NPT to 2″ NPT. Any questions please consult factory.