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Met One- BAM 1020 Continuous Particulate Monitor

The Met One BAM-1020 Continuous Particulate Monitor is a US-EPA–designated beta attenuation instrument for precise, long-term monitoring of PM10, PM2.5, and PM10-2.5 in ambient air quality applications.

  • EPA Equivalent Method: Approved for PM10, PM2.5, and PM10-2.5 using beta attenuation technology.
  • High Sensitivity & Accuracy: 0.1 µg/m³ resolution with low detection limits and auditable performance.
  • Long-Term Operation: Continuous hourly measurements with over 60 days of unattended operation per filter tape.
  • Advanced Control & Connectivity: Touchscreen interface, humidity-controlled inlet heater, data logging, alarms, and serial/USB communication.

Description

The Met One Instruments BAM-1020 Continuous Particulate Monitor is a regulatory-grade air quality instrument designed for continuous measurement of ambient particulate matter using the proven beta attenuation method. It is fully designated as a US-EPA Equivalent Method for PM10, PM2.5, and PM10-2.5, delivering highly accurate mass concentration data across a wide measurement range of 0–10 mg/m³. With a standard 16.67 L/min flow rate, hourly measurement cycles, and extremely low instrument noise, the BAM-1020 provides reliable, repeatable results that meet and exceed all US-EPA performance requirements, making it suitable for both regulatory compliance and scientific monitoring applications.

Engineered for long-term, unattended field operation, the BAM-1020 features a continuous glass fiber filter tape capable of more than 60 days of operation per roll, minimizing maintenance and operational costs. Advanced Smart Heater humidity control ensures stable measurements even in high-humidity environments, while automatic span checks, comprehensive alarm diagnostics, and extensive onboard data storage (up to 1.6 years of hourly data) enhance reliability and traceability. The instrument supports multiple communication interfaces including RS-232, USB, analog outputs, and alarm contacts, and is compatible with Air Plus™ and COMET™ software. Its rugged construction and flexible mounting options make the BAM-1020 ideal for fixed monitoring stations, portable shelters, environmental agencies, and research networks requiring dependable, EPA-approved particulate monitoring.

Features

  • US EPA Equivalent Method for Monitoring PM10, PM2.5, and PM10-2.5
  • Long-term unsupervised remote operation between site visits of up to 60 days.
  • Minimal operational expenses.
  • Automatic tests for Span Calibration.
  • Quick and simple field audits utilising standard FRM auditing equipment.
  • Mounting a bench top or an equipment rack in a portable or permanent shelter.
  • Durable construction using baked enamel, stainless steel, and anodized aluminium.
  • Flow system that is mechanically simple, highly precise, and dependable.
  • The impacts on volatile chemicals are reduced by hourly filter advancements.
  • The sample relative humidity is carefully controlled using cutting-edge Smart Heater technology.
  • It is possible to connect up to two multi-parameter meteorological sensors to an integrated datalogger.
  • RS-232 or RS-485 serial ports with direct PC interfaces, or digital data gathering devices, for data retrieval.

Specifications

Measurement Principle: Mass Concentration of Ambient Particulate Matter by Beta Attenuation
US-EPA Designations: US-EPA PM10 Equivalent Method: EQPM-0798-122

US-EPA Class III PM2.5 Equivalent Method: EQPM-0308-170

US-EPA PM10-2.5 Equivalent Method: EQPM-0709-185

Range: 0 – 10 mg/m3

(0 – 10,000 μg/m3)

 

Analog Ranges: 0 – 0.1, 0.2, 0.5, 1, 2, 5, 10 mg/m3

(others available)

Accuracy: Exceeds all US-EPA designation requirements for PM10, PM2.5, and PM10-2.5
Measurement Resolution: 0.1 μg/m3
Instrument noise (1 hour): Less than 2.4 μg/m3

(less than 2.0 μg/m3

typical). Auditable with zero filter test

Lower Detection Limit (2 ) (1 hour): Less than 4.8 μg/m3

(less than 4.0 μg/m3

typical). Auditable with zero filter test

Lower Detection Limit (2 ) (24 hours): Less than 1.0 μg/m3

. Auditable with zero filter test

Measurement Cycle Time: 1 Hour (others available)
Flow Rate: 16.67 liters/minute. Actual flow
Filter Tape: Continuous glass fiber filter, 30mm x 21m roll. > 60 day operation/roll
Span Check: Manual; Automatic optional
Beta Source: 14C (carbon-14), 60 μCi ±15 μCi (< 2.22 X 106

Beq), Half-Life 5730 years

Beta Detector Type: Photomultiplier tube with plastic scintillator
Operating Temp. Range: 0° to +50°C
Operating Humidity Range: 0-90% non-condensing
Humidity Control: Actively controlled inlet heater module, 10% – 99% RH setpoint
Approvals: US-EPA, MCERTS, CE, NRC, TUV, CNEMC, Korea
User Interface: Graphic color touch screen display
Analog Output: 2 channels, voltage range 0-1 VDC, 0-2.5 VDC, 0-5 VDC
Serial Interface: RS-232 2-way serial ports for PC or modem communications, USB
Contact Closure Specification: 1 channel, dry, Normally Open contact 12 VDC 0.5 A
Alarm Contact Closures: Data Error, Tape Fault, Flow Error, Power Failure, Maintenance
Compatible Software: Air Plus™, COMET™, HyperTerminal®
Error Reporting: User-configurable. Available through serial port, display, and relay outputs
Memory: 14,000 records (1.6 years @ 1 record/hr)
Power Supply: 100 – 240 VAC, 50/60 Hz Universal input
Weight: 19 kg (42 lbs) without external accessories
Unit Dimensions: H x W x D = 32 cm x 43 cm x 46 cm (12.5” x 17” x 18”)

 

Data Sheet

MetOne-BAM-1020-Datasheet-v2.1-20241126

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