Air Velocity Monitor MODELO 660

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Air Velocity Monitor MODELO 660

Model 660 Air Velocity Monitors are a practical, affordable way to continuously monitor for safe airflows through laboratory fume hoods. They are typically installed in the fume hood side fascia and connected to the interior sidewall via 11/2" flexible tubing. As the exhaust fan draws air through the device, a sensitive constant temperature thermistor measures flow and lights a green (normal), yellow (high) or red (low) LED. An audible alarm also warns of low flow and requires manual resetting. Mounting holes fit standard single gang electrical box.

To Order Specify:
Model 660 Air Velocity Monitor
No. A-150 AVM Accessory Kit, 3 ft. 11/2" flexible tubing, 90° bulkhead fitting and (2) nylon tie wraps
No. A-699 Transformer, 120 VAC input, 24 VDC output

High Setpoint Range: 0-275 FPM (0-1.397 m/s)
Low Setpoint Range: 0-150 FPM (0-.792 m/s)
Repeatability: ±7% of full span, 0-50 and 150-275 FPM ±5% of full span, 50-150 FPM
Compensated Temperature Range: 50-90°F (10-32.2°C)
Operating Temperature Range: 32-120°F (0-48.9°C)
Compatibility: Air and non-combustible, non-corrosive gases
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
Weight: 3 ounces (85 grams)
Mounting Hardware: (2) #6 x 1" sheet metal screws, (2) 6-32 x 7/8" machine screws

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