有8種量程供選擇，單位為FPM或MPS
641B系列 風速變送器采用熱式質(zhì)量流量傳感技術。可選量程范圍從250 FPM 到 2000 FPM或公制單位1.25 MPS 到 10 MPS。它隔離輸出和風速相應的4-20mA標準信號。
它的金屬傳感器能夠用于空氣質(zhì)量較差的應用環(huán)境。可在現(xiàn)場用軟布清潔，或用空氣吹洗清潔。它非常容易清潔和維護的特點使得它能用于環(huán)境比較惡劣，其它類型的傳感器難以勝任的場合。
Service: Air And Compatible, Non-Combustible Gases.
Accuracy: 5% FS Process Gas: 32 To 122°F (0 To 50°C); 6% 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 176°F (-40 To 80°C). Ambient: 32 To 140°F (0 To 60°C).
Humidity 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.
Enclosure Rating: Designed To Meet NEMA 4X (IP66).
Mounting Orientation: Unit Not Position Sensitive.
Weight: 12.6 Oz (357.2 G).
*A Brief Current Transient Exceeding 300 MA May Be Seen On Startup.
ACCESSORIES:
- A-155 - Cable Gland With 1/2" Male NPT Fitting.
- A-156 - Flange Mounting Plate With 1/2" Female NPT.
