The Dwyer SERIES 641RM features the same highly accurate heated mass flow sensor as the Series 641, with a remote probe construction. The units 6´ cable which connects the sensing probe with the electronic enclosure allows the enclosure to be mounted where it can be more easily accessed.
Product Applications
Service : Clean air and compatible, non-combustible gases.
Accuracy : 3% FS Process gas: 32 to 122°F (0 to 50°C); 4% FS Process gas: -40 to 32°F & 122 to 212°F (-40 to 0°C & 50 to 100°C).
Response Time : Flow: 1.5 s to 95% of final value (output filter set to min.).
Temperature Limits : Process: -40 to 212°F (-40 to 100°C).
Ambient : 32 to 140°F (0 to 60°C).
Pressure Limit : 100 psi (6.89 bar) maximum.
Humidity Limit : Non-Condensing.
Power Requirements : 12 to 35 VDC, 10 to 16 VAC. 1.5 A rating required on supply due to initial power surge drawn by transmitter.
Output Signal : 4 to 20 mA, isolated 24 V source, 3 or 4-wire connection.
Output Filter : Selectable 0.5-15 s.
Loop Resistance : 600 Ω max.
Current Consumption : 300 mA max.
Electrical Connections : Screw terminal.
Mounting Orientation : Unit not position sensitive. Probe must be aligned with airflow.
Weight : 13.2 oz (374.26 g).
Cable Length : 6′ (1.82 m).
Probe Length : 12″ (30.48 cm) standard.
Probe Diameter : 5/16″ (0.79 cm).
OPTIONAL DISPLAY VERSION:
Display : 4-1/2 digit 1/2″ red LED.
Resolution : 1 FPM, 0.01 MPS (10 FPM @ 10,000 and 15,000 FPM ranges).
Weight : 13.9 oz (394.16 g).
Manuals: 641RM
Catalog Pages: Series 641RM Catalog Page
Brass or Stainless Steel Flow Switch
