介质:干净的空气和兼容的，不可燃的气体。

精度:3% FS气体温度: 32~122°F (0~50°C); 4% FS气体温度: -40~32°F & 122~212°F (-40~0°C & 50~100°C).

反应时间:流量: 1.5s-95%最终值 (输出过滤器设置最小).

温度范围:过程: -40~212°F (-40~100°C). 环境: 32~140°F (0~60°C).

压力限制:100 psi (6.89 bar)最大.

湿度限制:不结露

电源:12-35 VDC, 10-16 VAC. 1.5 A 由于变送器产生的初始功率波动，供电系统需要的额定功率。

输出信号:4-20 mA,隔离24V电源，3或4线连接

输出过滤器:可选0.5-15 s.

回路阻抗:600 Ω最大.

功耗:300 mA最大.

电气连接:螺丝端子

过程连接:1/2"NPT外螺纹.

封装:设计符合NEMA 4X (IP66)，仅对于无LED型号.

安装方向:单元位置不敏感。探头必须与气流对齐。

重量:12.6 oz (357.2 g).

认证:CE.

选择LED显示:

显示:4-1/2位1/2"红色LED.

分辨率:1 FPM, 0.01 MPS (10 FPM @ 10,000 and 15,000 FPM ranges).

重量:13.3 oz (377 g).

选型表

Model	Description
641-12	Air velocity transmitter, 12" (304.8 mm) probe length.
641-12-LED	Air velocity transmitter, 12" (304.8 mm) probe length, with LED display.
641-18	Air velocity transmitter, 18" (457.2 mm) probe length.
641-18-LED	Air velocity transmitter, 18" (457.2 mm) probe length, with LED display.
641-24	Air velocity transmitter, 24" (609.6 mm) probe length.
641-24-LED	Air velocity transmitter, 24" (609.6 mm) probe length, with LED display.
641-30	Air velocity transmitter, 30" (762 mm) probe length.
641-30-LED	Air velocity transmitter, 30" (762 mm) probe length, with LED display.
641-36	Air velocity transmitter, 36" (914 mm) probe length.
641-36-LED	Air velocity transmitter, 36" (914 mm) probe length, with LED display.
641-6	Air velocity transmitter, 6" (152.4 mm) probe length.
641-6-LED	Air velocity transmitter, 6" (152.4 mm) probe length, with LED display.

EXAMPLE	641	6	LED	Series 641 Air Velocity Transmitter, 6" probe, with LED display.
SERIES	641			Air Velocity Transmitter
PROBE LENGTH		6 12 18 24 30 36		6" 12" 18" 24" 30" 36"
OPTIONS			AT LED NIST ST	Aluminum Tag LED Display NIST Certificate of Calibration  Stainless Steel Tag

使用LED指示灯显示范围设置，在设备内部的控制标签上标注了这些指标的功能。下表汇总了每个范围设置的指示状态：