Skip to content
AkerminMeasure. Monitor. Improve. Compare Products
Review

Temtop M100 2nd Review: Updated Features and Sensor Coverage

The Temtop M100 2nd Gen is a desktop air quality monitor built for rooms where everyone should see the number. This review covers the NDIR CO₂ and laser particle sensors, the large touchscreen, the Wi-Fi app and the LoRa extension that lets one display report on several rooms.

By the Akermin Editorial Team · 4 min read

As an Amazon Associate, Akermin earns from qualifying purchases. Product links on this page are affiliate links.

Temtop M100 2nd Review: Updated Features and Sensor Coverage

Temtop · Temtop WiFi Air Quality Monitor M100 2nd Gen, 7 Inch Touchscreen CO2 Detector & Air Quality Tester for PM2.5 PM10 TVOC Temperature Humidity, Air Analyzer for Home Office with LoRa Extension

View on Amazon

Price and availability are shown on Amazon and can change at any time.

Verdict

The M100 2nd Gen is Temtop’s flagship desktop monitor. It measures seven parameters, CO₂ from an NDIR sensor, PM2.5 and PM10 from a laser sensor, TVOC, temperature, humidity and a calculated AQI, and shows them on a 7-inch touchscreen with daily and monthly graphs. It connects to the Temtop app over 2.4 GHz Wi-Fi and, unusually, accepts LoRa sub-units so that sensors in other rooms report to the same display and account. A 4000 mAh battery gives more than 8 hours away from the outlet. For a school, office or clinic that wants one prominent screen and the option to grow into a multi-room system, the documentation supports it strongly. For a single bedroom it is more display than you need.

Who It Is For

  • Schools and offices that want a wall or desk display visible to everyone plus remote visibility for the facilities team.
  • HVAC technicians and building managers who want to log several rooms from one account.
  • Households that want an all-in-one monitor with a screen large enough to read from the sofa.

Our guide to choosing a CO₂ monitor for an office explains why a shared display often does more than a phone alert.

Documented Specifications

Item Documentation
Measurements PM2.5, PM10, CO₂, TVOC, temperature, humidity, AQI
Sensors Laser particle sensor, NDIR CO₂ sensor, TVOC and temperature-humidity sensors
Display 7-inch HD touchscreen, light and dark themes, screen saver, adjustable brightness
Graphs Daily and monthly trends, max and min values
Connectivity 2.4 GHz Wi-Fi to the Temtop app; LoRa sub-units (sold separately) up to 1000 m
Extras Localised 7-day weather forecast, do-not-disturb mode
Calibration Manual for PM2.5, CO₂, temperature and humidity
Alarms Custom threshold per parameter
Battery 4000 mAh, over 8 hours

Sensors and Calibration

The NDIR CO₂ sensor is the right technology for ventilation decisions, and Temtop naming it explicitly is helpful. The laser particle sensor reports PM2.5 and PM10 and drives the AQI figure; it responds to cooking, smoke and dust within minutes, and like all optical sensors it estimates mass rather than weighing it. TVOC is a relative index that flags cleaning products and off-gassing. What sets the M100 2nd Gen apart is that four of these readings can be manually calibrated from the device: CO₂ against fresh air, PM2.5 and the comfort sensors against a reference. Most consumer monitors allow CO₂ calibration only. See how to calibrate a CO₂ monitor for the fresh-air procedure and comparing CO₂ accuracy specifications for what the numbers mean.

The Touchscreen

A 7-inch screen turns the monitor into a room dashboard. All seven values show at once with colour coding, and tapping into a parameter opens the daily or monthly graph with max and min values, so you can see the lunchtime CO₂ peak in a classroom without a laptop. The light and dark themes, adjustable brightness and screen saver matter because the display is always on; the do-not-disturb mode silences alarms overnight. The localised weather forecast is a convenience rather than an air quality feature, but owners with outdoor-sensitive conditions find it handy alongside the indoor readings.

Wi-Fi and LoRa Networking

Wi-Fi brings the readings to the Temtop app for remote viewing, notifications and device management. The LoRa extension is the feature that makes the M100 2nd Gen more than a single-room monitor: sub-units placed in other rooms transmit over a low-power long-range radio to the main unit, and the listing quotes up to 1000 m of range. That lets a school put the display in the office and sensors in classrooms, without running Wi-Fi to every sensor. The sub-units are a separate purchase, so budget for them if multi-room coverage is the goal. Comparisons with cloud-based systems are in building a whole-home air quality monitoring setup.

Strengths

  • Named NDIR CO₂ sensor plus laser particles and TVOC on one large screen.
  • Manual calibration for four parameters.
  • LoRa sub-unit networking for multi-room coverage.
  • Battery long enough for a walk-through survey.

Limitations

  • 2.4 GHz Wi-Fi only.
  • Designed for mains power; not a bedside or pocket monitor.
  • LoRa sub-units are an extra purchase.
  • TVOC is a relative index and there is no formaldehyde sensor.

How It Compares

The Qingping Air Monitor 2 covers a similar sensor set on a 4-inch touchscreen, adds noise and eTVOC, and supports 5 GHz Wi-Fi, but has no multi-room radio. The Temtop M2000 2nd is the portable alternative with formaldehyde and USB export. The original M100 is superseded by this model. Choose the 2nd Gen when the screen size and the LoRa option matter.

How We Research

This review is based on Temtop’s published specifications, the Amazon listing and owner reports. We did not run laboratory tests.

Qingping Air Quality Monitor Gen 2, Air Quality Monitor Indoor Detects PM2.5, CO2, PM10, Noise, Temperature and Humidity, New Upgraded Alarm Clock Function, Air Quality Tester for Bedroom, Smart Home

Qingping Air Quality Monitor Gen 2, Air Quality Monitor Indoor

View on Amazon
Temtop Professional Air Quality Analyzer & CO2 Monitor Particle Counter

Temtop Professional Air Quality Analyzer & CO2 Monitor Particle Counter

View on Amazon
IQAir AirVisual Air Quality Monitor Bundle, Swiss-Designed Indoor & Outdoor Sensors, Professional Grade Real-Time Air Quality Tracking

IQAir AirVisual Air Quality Monitor Bundle, Swiss-Designed Indoor & Outdoor

View on Amazon

Products shown because their documented specifications fit this guide. Price and availability are on Amazon and can change.

Frequently Asked Questions

What is the LoRa extension?

LoRa is a low-power long-range radio. The listing states that LoRa sub-units, sold separately, can report to the M100 2nd Gen from up to 1000 m away, so one display and one app account can cover several rooms or buildings.

Does it need Wi-Fi?

The screen works without a network. Wi-Fi (2.4 GHz only) is needed for the Temtop app, remote notifications, the weather forecast and remote device management.

Can the sensors be calibrated?

Yes. The listing states manual calibration for PM2.5, CO₂, temperature and humidity, which is more than most consumer monitors allow.

Is it a portable monitor?

It has a 4000 mAh battery rated for over 8 hours, enough to carry it between rooms for an HVAC check, but a 7-inch screen with a particle sensor is designed to live on mains power.

Affiliate disclosure: Akermin earns a commission from qualifying Amazon purchases made through links on this page. Our editorial picks are based on documented specifications and owner feedback, not commissions.