Met OneBT-645 Portable Dust Monitor

The BT‐645 Portable Dust Monitor has beendesigned to continuously measure and record

particulate information for indoor work placeand public place environments.

Key Features:

• ‘Real Time’ monitoring
• Simple operation
• Rugged design
• Built-in Datalogger
• Purge air system
• Low power consumption

Optical Sensor

A laser optical sensor is used to detect and measure particulate concentrations up to 100 milligrams per cubicmeter. The continuous flow optical sensor is combined with purge air to ensure accurate measurements inadverse environments.

Rugged Design

The optical sensor, matched electronics and backlit display, are enclosed in a rugged metal enclosure to protectthe instrument from normal daily use.

Data Storage

The internal datalogger will store over 5,000 samples. Sample history events can be viewed on the display ordownloaded to a computer using Comet software.

Battery Operation

The internal battery pack provides over 10 hours of continuous opera

• Met OneBT-645 Portable Dust Monitor

Specifications

OPERATING PRINCIPLE  :  Forward light scatter laser nephelometer

PERFORMANCE

• Concentration Range  :  0 to 100 mg/m3 (0 to 100,000 μg/m3)
• Sensitivity  :  1 ug/m3
• Accuracy  :  5% traceable to standard with 0.6 μm PSL
• Measuring Time   :  1, 5, 10, 15, 30 and 60 minutes
• Flow Rate   :  2 LPM
• Note: Measurement accuracy requires use of appropriate K-factorfor the material being measured.
• ELECTRICAL

• Light Source  :  Laser diode, 5 mW, 670 nm
• Power  :  14.8V Li-ion (Lithium Ion) battery pack
• Battery Life   :  Over 10 hours continuous operation
• AC Adapter/Charger  :  Li-ion battery charger, 100-240 VAC, 50/60Hz to
• 16.8V@1.8A
• Communications  :  RS-232, USB
• Data Storage  :  Over 5,000 samples
• INTERFACE

• Display  :  4 X 20 LCD
• Keyboard   :  6-key membrane type
• PHYSICAL

• Dimension  :  H 4.25”(10.8 cm) x W 7.44”(18.9 cm) x T3.25” (5.4 cm)
• Weight  :  3.7 lbs (1.7 kg)
• ENVIRONMENTAL

• Operating Temperature  :  0°C to +50°C
• Relative Humidity  :  90% (non-condensing)
• Storage Temperature    :  -20°C to +60°C

ACCESSORIES  : 

Supplied User Manual, USB Cable, Communications
• Software (Comet), AC Adapter / Battery Charger

Optional

• PM2.5 Sharp Cut Cyclone (SCC-112)
• PM10 Sharp Cut Cyclone (SCC-110)
• Custom Serial Cable (PN 3228)