Model 660 Air Velocity Monitor

Continuously Measures Fume Hood Airflow

This model is no longer available, see Model 670 for the suggested replacement.


Air and non-combustible, non-corrosive gases.
High Setpoint Range:
0-275 FPM (0-1.397 m/s).
Low Setpoint Range:
0-150 FPM (0-.792 m/s).
±7% of full span, 0-50 and 150-275 FPM; ±5% of full span, 50-150 FPM.
Compensated Temperature Range:
50 to 90°F (10 to 32.2°C).
Operating Temperature Range:
32 to 120°F (0 to 48.9°C).
Power Supply:
24 VAC, 3 watts maximum.
Response Time:
6-10 seconds.
Warm-Up Time:
3-5 minutes (no flow).
Audible Alarm:
75 dB between 3-10 feet.
3 oz (85 g).
Mounting Hardware:
(2) #6 x 1" sheet metal screws, (2) 6-32 x 7/8" machine screws.

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