Reno, NV - EPA FASM Base Testing Report - PM 2.5 Clarity Node-S

Sep 4, 2026

Report documenting v2.1 Global PM2.5 calibration performance for Clarity Node-S sensors deployed in Reno, Nevada by the Northern Nevada Public Health Air Quality Management Division from June 2024 through October 2024. Includes deployment details, sensor/FRM-FEM information, calibration dates, flowrate verification, and maintenance activities. Presents performance metrics for sensor-FRM/FEM accuracy, bias and linearity, correlation (R2), slope/intercept, error measures (RMSE/NRMSE), sensor-sensor precision (CV/SD), uptime, paired value counts, and meteorological influence using normalized concentration with temperature and relative humidity.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages3

Reading Time8 min

AccessFree to download

Testing Report-PM 2.5 Base Testing Clarity Node-S

Deployment Details

Testing Organization and Site Information

Performance Metrics

Sensor-FRM/FEM Correlation

Sensor-Sensor Precision

Meteorological Conditions During Deployment

Meteorological Influence

Sensor-FRM/FEM Scatter Plots

Testing Report-PM 2.5 Base Testing Clarity Node-S This report reflects the v2.1 Global PM2.5 Calibration performance Reno, NV Northern Nevada Public Health Air Quality Management Division June 2024—October 2024 | | | | Deployment Details
Sensor Information Manufacturer, model Clarity Node-S Device firmware version [2.4.1.01](2.4.1.01) Sampling time interval 1-hour Sensor serial numbers AMGHCPFP AN6R7Y47 A4JFGM4L Issues encountered during deployment? 􀂅 No Issues
FRM/FEM Information Manufacturer, model, designation Met One Instruments, Inc. BAM-1020 VSCC Sampling time interval 1 Hour Date of calibration 07/15/24 (BP cal only)
08/14/24 (BP cal only)
10/07/24 (BP cal only) Date of flowrate verification check 06/17/24, 07/01/24, 07/15/24, 07/31/24, 08/14/24, 08/26/24, 09/09/24, 09/23/24, 10/07/24, 10/14/24 – semi-annual flow audit Description, date(s) of maintenance activities 06/17/24 – smart heater , RH, and filter temp test; span membrane test , beta detector count, dark count
07/01/24 – PM10 inlet, PM2.5 VSCC, nozzle, vane, capstan shaft , and pinch rol ler maint
07/11/24 – filter tape replacement
07/31/24 – PM10 inlet, PM2.5 VSCC, nozzle, vane, capstan shaft , and pinch rol ler maint
08/26/24 – PM10 inlet, PM2.5 VSCC, nozzle, vane, capstan shaft , and pinch rol ler maint
09/09/24 – filter tape replacement
09/23/24 – PM10 inlet, PM2.5 VSCC, nozzle, vane, capstan shaft , and pinch rol ler maint | | --- | --- | --- | --- | | | Testing Organization and Site Information | | | | | Testing organization
(Name, Organization type, Contact website) | Northern Nevada Public Health Air Quality Management Division | | | | Testing location
(City, State, Latitude and Longitude) | Reno4
Reno, NV
39. 52, -119.8 | | | | AQS site ID | 32-031-0031 | | | | Sampling timeframe
(MM-DD-YY) | 06-07-24 to 10-15-24 | | | | Sensor data source | Clarity Cloud | | | | Reference data source | PM2.5 : AirNow API Meteorological: Files from NNPH | | | | | | | Performance Metrics Sensor-FRM/FEM Accuracy Sensor-Sensor Precision Meteorological Conditions During Deployment | Number of 24-hr periods outside sensor manufacture-listed temperature operational range (no operational range specified) | - | | --- | --- | | Number of 24-hr periods outside sensor manufacture-listed relative humidity operational range (no operational range specified) | - | Meteorological Influence | Mean number of paired, normalized concentration and temperature values (1-hr averages) | 3116 | | --- | --- | | Mean number of paired, normalized concentration and relative humidity values (1-hr averages) | 3116 | Testing Report-PM 2.5 Base Testing Clarity Node-S This report reflects the v2.1 Global PM2.5 Calibration performance Reno, NV Northern Nevada Public Health Air Quality Management Division June 2024—October 2024 Tabular Statistics Sensor-FRM/FEM Correlation | | Bias and Linearity | | | | | | Data Quality | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | | R2 | | Slope | | Intercept (µg/m³) | | Uptime (%) | | Number of paired sensor and FRM/FEM concentration values | | | | 1-Hour ●●● | 24-Hour ●●● | 1-Hour ●●● | 24-Hour ●●● | 1-Hour ●●● | 24-Hour ●●● | 1-Hour ●●● | 24-Hour ●●● | 1-Hour | 24-Hour | | Metric Target Range | ≥ 0.70 | ≥ 0.70 | 1.0 ± 0.35 | 1.0 ± 0.35 | -5 ≤ b ≤ 5 | -5 ≤ b ≤ 5 | 75%* | 75%* | - | - | | Sensor AMGHCPFP | 0.86 | 0.93 | 1.06 | 1.21 | 1.60 | 0.78 | 100 | 100 | 3053 | 127 | | Sensor AN6R7Y47 | 0.86 | 0.93 | 1.08 | 1.24 | 1.69 | 0.85 | 100 | 100 | 3055 | 127 | | Sensor A4JFGM4L | 0.86 | 0.93 | 1.09 | 1.24 | 1.68 | 0.84 | 100 | 100 | 3054 | 127 | | Mean | 0.86 | 0.93 | 1.08 | 1.23 | 1.66 | 0.82 | 100 | 100 | 3054 | 127 | | | Error | | | | | --- | --- | --- | --- | --- | | | RMSE (µg/m³) | | NRMSE (%) | | | | 1-Hour ★ | 24-Hour ★ | 1-Hour ☆ | 24-Hour ☆ | | Metric Target Range | ≤ 7.0 | ≤ 7.0 | ≤ 30.0 | ≤ 30.0 | | De

FAQs

What sensors and reference instruments are used in the PM2.5 base testing?

Clarity Node-S sensors are evaluated with Met One Instruments, Inc. BAM-1020 as the FRM/FEM reference. The report lists sensor serial numbers and device firmware version, along with calibration and verification information for the reference instrument.

What time period and data sources define the deployment?

The deployment runs from June 2024 through October 2024, with sampling timeframe listed as 06-07-24 to 10-15-24. Sensor data is sourced from Clarity Cloud, and reference data comes from AirNow API meteorological files from NNPH.

Which performance metrics are reported for sensor accuracy and precision?

The report covers sensor-FRM/FEM accuracy using correlation (R2), bias and linearity (slope and intercept), error metrics (RMSE and NRMSE), and data quality measures such as uptime and paired value counts. Sensor-sensor precision is reported via CV (%) and SD for 1-hour and 24-hour aggregation periods.

Sep 4, 2026

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