Model 641RM Air Velocity Transmitter with 6 ft. Cable
	Quantity in Basket: None Code: DW641RM Price: $480.00 Shipping Weight: 1.00 pounds
	LED Display , red 4-1/2 digit (Add $105)
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The Series 641RM is the ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor, which allows for precise velocity measurements at various flow rates and temperatures. The 641RM’s 16 field selectable ranges from 0-250 to 15,000 FPM (0-1.25 to 75 MPS) provide it the versatility to be selected for a multitude of applications. The unit’s 6’ cable which connects the sensing probe with the electronic enclosure allows the enclosure to be mounted where it can be more easily accessed. Longer cable lengths are available for ducts that are at very high elevations from the plant floor. The optional LED produces a complete, compact solution for local indication of air flow. • Ranges to 15,000 FPM or 75 MPS • Optional Bright LED Display • Easy Push Button Set-up • Compact Remote Mounted Housing • 4-20 mA Output • Digital Filter for Signal Damping Applications • Exhaust Stack Flow Monitoring • Air Control in Drying Processes • HVAC Air Velocity Measurements • Fan Supply and Exhaust Tracking SPECIFICATIONS 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 seconds to 95% of final value (Output filter set to minimum) 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: 12–35 VDC, 10–16 VAC Output Signal: 4-20 mA, isolated 24V source, 3 or 4-wire connection Output Filter: Selectable 0.5 –15 (seconds) Loop Resistance: 600 ohms max. Current Consumption: 300 mA max. Electrical Connections: Screw terminal Mounting Orientation: Unit not position sensitive. Probe must be aligned with airflow Enclosure Rating: Designed to meet NEMA 4X (IP66) for non LED models only Weight: 13.2 oz (374.26 g) Cable Length: 6 ft (1.82m) Probe Dimensions: 5/16" dia. (0.79cm) x 12" long (30.48cm) standard 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)             Product Data Sheet

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