by
The Leading Enterprise Internet of Things Solution
Wireless PM 2.5 Air Quality Sensors
General Description
The ALTA wireless PM2.5 sensor measures PM1,
PM2.5 and PM10 concentrations in the air and
transmits the measurement to iMonnit.
• Measurement range:
- PM1: 0.3 to 1.0 um
- PM2.5: 1.0 to 2.5 um
- PM10: 2.5 to 10 um
AIR QUALITY
Features of Monnit ALTA Sensors
•
•
•
•
•
•
Wireless range of 1,200+ feet through 12+ walls *
Frequency-Hopping Spread Spectrum (FHSS)
Improved interference immunity
Improved power management for longer battery life **
(12+ years on AA batteries)
Encrypt-RF® Security (Diffie-Hellman Key Exchange
+ AES-128 CBC for sensor data messages)
Onboard data memory stores up to 512 readings
per sensor:
- 10-minute heartbeats = 3.5 days
- 2-hour heartbeats = 42 days
Over-the-air updates (future proof)
Free iMonnit basic online wireless sensor monitoring
and notification system to configure sensors, view
data and set alerts via SMS text and email
Principle of Operation
The PM2.5 sensor works by turning on a small fan at
the beginning of a measurement cycle to bring in a
volume of ambient air and measuring the particulate
matter (PM) content of that sample volume. The sensor
measures PM content using a laser that scatters based
on the number and size of particles suspended in the
air. It is important to keep the inlet ports of the sensor
clear to ensure proper readings.
•
•
*
Actual range may vary depending on environment.
**
Battery life is determined by sensor reporting
frequency and other variables. Other power options
are also available.
Example Applications
•
•
•
•
•
•
•
•
Building/Room Air Quality
Pollution Sensing
Mines and Quarries
Cement Factories
Construction/Demolition Sites
Petrochemicals
Agricultural/Waste
Many additional applications
Wireless Range Comparison
Wireless Range Comparison
Monnit ALTA
Monnit
Other Wireless Platforms
Wifi
Bluetooth
PAGE 1
4.880
2.256
www.monnit.com
© 2018 Monnit Corp.
LONG RANGE WIRELESS
PM 2.5 AIR QUALITY
SENSOR
4.134
1.495
ALTA PM 2.5 Air Quality Sensor | Technical Specifications
Supply voltage
Current consumption
2.0–3.8 VDC (3.0–3.8 VDC using power supply) *
0.2 µA (sleep mode), 0.7 µA (RTC sleep), 570 µA (MCU idle), 2.5
mA (MCU active), 5.5 mA (radio RX mode), 22.6 mA (radio TX
mode)
-18°C to 55°C (0°F to 130°F) with Alkaline Batteries
-40°C to 85°C (-40°F to 185°F) with Lithium Battery
-40°C to 85°C (-40°F to +185°F) with Industrial Battery
PM1: 0.3 to 1.0 um
PM2.5: 1.0 to 2.5 um
PM10: 2.5 to 10 um
50% @ 0.3 um, 98% @ >= 0.5 um
0 to 500 ug/m^3
0 to 1000 ug/m^3
+/- 10% @ 100 to 500 g/m^3
+/- 10 ug/m^3 @ 0 to 100 ug/m^3
~10 Seconds***
~180 mA @ 3.3 battery voltage, ~0.6 W overall
-10 to 60 C
0 to 99%
-40 to 80 C
>= 3 Years
Up to 512 sensor messages
1,200+ ft non-line-of-sight
900 MHz—Frequency-Hopping Spread Spectrum
868 MHz and 433 MHz—Frequency-Agile Wireless
Encrypt-RF® (256-bit key exchange and AES-128 CTR)
3.7 ounces
Operating temperature range (commercial version) **
Operating temperature range (industrial version) **
Measurement sensitivity
Counting efficiency
Effective range
Maximum range
Maximum consistency error
Response time
Active current
Operating temperature
Operating humidity
Storage temperature
Mean time to failure
Integrated memory
Wireless range
Wireless operation
Security
Weight
Certifications
Industry
Canada
900 MHz product; FCC ID: ZTL-G2SC1 and IC: 9794A-G2SC1.
868 and 433 MHz product tested and found to comply with: EN
300 220-2 V3.1.1 (2017-02), EN 300 220-2 V3.1.1 (2017-02) and
EN 60950
*
Hardware cannot withstand negative voltage. Please take care when connecting a power device.
**
At temperatures above 100°C, it is possible for the board circuitry to lose programmed memory.
***
Response time may vary with stability threshold setting and PM concentration. Increasing the stability threshold will improve response time but
reduce stability and accuracy of readings. With higher PM concentrations the sensor will acquire stable readings more quickly.
Installation Note
Install the sensor with the intake slits pointing down to prevent accumulation of dust and or moisture in the sensing
element housing. Ensure that the intake slit is open to the ambient air without any obstructions within 1 inch from the slits.
PAGE 2
Commercial Grade Sensors
Monnit commercial grade sensors are designed for applications in ordinary environments (normal room temperature,
humidity and atmospheric pressure). Do not use these sensors under the following conditions as these factors can
deteriorate the product characteristics and cause failures and burn-out.
•
Corrosive gas or deoxidizing gas: chlorine gas, hydrogen sulfide gas, ammonia gas, sulfuric acid gas, nitric oxides
gas, etc.
•
Volatile or flammable gas
• Dusty conditions
• Low-pressure or high-pressure environments
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Wet or excessively humid locations
• Places with salt water, oils chemical liquids or organic solvents
•
Where there are excessively strong vibrations
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Other places where similar hazardous conditions exist
Use these products within the specified temperature range. Higher temperature may cause deterioration of the
characteristics or the material quality.
For more information about our products or to place an order, please contact
our sales department at 801-561-5555.
Visit us on the web at
www.monnit.com.
Monnit Corporation
3400 South West Temple
Salt Lake City, UT 84115
801-561-5555
www.monnit.com
Monnit, iMonnit, ALTA, PinchPower, Encrypt-RF and all other trademarks are property of Monnit, Corp.
© 2018 Monnit Corp. All Rights Reserved.
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