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​Model T640
with NumaView™ Software
T640 PM Mass Monitor 


  • Continuous, real-time PM10 and PM2.5 mass concentration results

  • Simple set-up and 10-minute warm up time

  • Superior measurement sensitivity and precision

  • Long autonomy and low power consumption

  • Low maintenance and cost of operation

  • US EPA-approved


08354E T640 USER MANUAL.pdfT640 Manual6302 KB
22-002A REST API Tutorial For Numaview Instruments - GCAL-O3.pdfREST API Tutorial for NumaView Instruments584 KB
ESD Fundamentals - 04786.pdfFundamentals of Electro-Static Discharge (ESD)216 KB
NVS Remote Manual - 08492.pdfNumaView™ Software Remote User Guide867 KB
SAL000076K - Environmental Instruments Overview.pdfEnvironmental Instruments Overview610 KB
SAL000090E - T640.pdfT640 Specification1208 KB
SAL000090F-CN T640.pdfT640规格 (Chinese Specification)3789 KB
SAL000091C - T640 Brochure.pdfT640 Brochure4394 KB
SAL000094A - T640 Enclosure.pdfT640 Enclosure Specification2707 KB
SAN21-0007A - Model T640 A Reference Device for Low-cost Particulate Sensors.pdfA Reference Device for Low-cost Particulate Sensors289 KB
T SERIES_6PG.BROCHURE_2018_web.pdfT Series with NumaView™ Software Brochure9567 KB


Measurement Principle Broadband spectroscopy using 90°
white-light scattering with Polychromatic LED
Particle size resolution 256 sizes over 0.18 – 20µm range,
combined to 64 channels for mass calculation
PM Mass Measurements PM10, PM2.5 and PM10-2.5 simultaneously; PM1 (optional)
PM Mass Resolution Measurement Range 0.1 - 10,000 µg/m3
Mass Measurement & Display Resolution 0.1 µg/m3
Precision ±0.5 ug/m3 (1-hr average)
Lower Detectable Limit <0.1 ug/m3 (1-hr average)
Data Rate 10s to 48hr (user selectable)
Mass Concentration Accuracy Exceeds US EPA PM10 FEM and Class III FEM PM2.5
performance requirements for additive and
multiplicative bias compared to FRM samplers
Flow Rate 5.0-lpm sample flow (Standard model);
11.67-lpm optional bypass flow (with option 640x)
Flow Accuracy Within ±1%; (Typically within ±0.5%)
Operating Conditions
Operating Temperature 0 - 50°C, non-condensing
Ambient Temperature -40 - 60°C
Ambient Relative Humidity 0 - 100%
Sample Humidity Control 24VDC, 90W (max) heater controlled to 35% RH
Weatherproof enclosure required with 0 - 50°C, non-condensing environmental control
Requires only 10-min warm-up time
Interfaces and Data Storage
T Series analyzer interface with full touch screen display and NumaView™ premium operating software and NumaView™ remote software
4Gb memory allows for > 1 year of internal data storage
Front Panel USB Ports 2x type-A Peripheral Ports
Ethernet Communication (supports TCP/IP Modbus and HTTP polling protocols)
T640 instrument 100 - 24​0VAC 50/60Hz, Power consumption
< 120W @ 120VAC
External pump (for optional bypass flow - option 640x) 100 - 120VAC 60Hz or 220-240VAC 50/60Hz,
Power consumption <360W @ 120VAC
Physical Specifications
Unit dimensions (HxWxD) 7” x 17” x 14” (17.8 x 43.2 x 35.6 cm)
Unit weight 19 lbs (8.6 kg)
Sample heater tube height 43” (109 cm)
Sample heater tube weight 6 lbs (2.7 kg)
US EPA PM2.5 Federal Equivalent Method EQPM-0516-236
US EPA PM2.5 Federal Equivalent Method EQPM-0516-238*
US EPA PM10 Federal Equivalent Method EQPM-0516-239*
US EPA PM10-2.5 Federal Equivalent Method EQPM-0516-240*
*with 640x option

Specifications are subject to change without notice.
All specifications are based on constant conditions.​


The Model T640 PM Mass Monitor is the next breakthrough in ambient particulate monitors​. The T640 delivers 1-min or better time resolution with exceptional sensitivity and precision. The instrument is very low maintenance and requires no sample media for minimal cost of operation.​


The Teledyne API Model T640 with 640X Option is a real-time, continuous particulate matter (PM) mass monitor that uses scattered light spectrometry for measurement. The T640 measures 2.5 PM, and the 640X Option measures 2.5, 10, and coarse PM. ​​​

All T Series instruments offer an advanced color display, capacitive touch screen, intuitive user interface, flexible I/O, and built-in data acquisition capability.  All instrument set up, control and access to stored data and diagnostic information is available through the front panel, or via RS232, Ethernet, or USB com ports either locally or by remote connection.  

The Model T640 comes with NumaView software. NumaView Remote PC software allows for a remote connection with virtual interface and data downloading capability to analyzers operating NumaView software.​