This Dwyer Instruments air velocity transmitter has 16 field selectable ranges
This Dwyer Instruments air velocity transmitter 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 641’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 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. The LED produces a complete, compact solution for local indication of air flow.
Features:
- 16 Field selectable ranges from 0-250 to 15,000 FPM
- Versatility to be selected for a multitude of applications
- 6' Cable allows the enclosure to be mounted where it can be more easily accessed
Applications:
- Clean Room Fresh Air Supply
- HVAC Air Velocity Measurements
- Fan Supply and Exhaust Tracking
- Ensure Porper Lab Hood Exhaust Flow Rates
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 |
| Humidty Limit: |
Non-Condensing |
| Power Requirements: |
12-35 VDC, 10-16 VAC. 1.5 A rating required on supply due to initial power surge drawn by transmitter. |
| 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 Orinetation: |
Unit not position sensitive. Probe must be aligned with airflow |
| Weight: |
13.9 oz (394.16 g) |
| Display: |
4-1/2 digit 1/2" red LED |
| Resolution: |
1 FPM, 0.01 MPS (10 FPM @ 10,000 and 15,000 FPM ranges) |
| Cable Length: |
6 ft (1.82 m) |
| Probe Length: |
12" (30.48 cm) standard |
| Probe Diameter: |
5/16" (0.79 cm) |
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