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TEMTOP M2000 · 2ND GENERATIONKnow Exactly What You're Breathing
The 5-in-1 indoor air quality monitor that tracks PM2.5, PM10, CO₂, formaldehyde (HCHO), temperature and humidity at the same time — on one screen, with no app, no Wi-Fi and no subscription.
5 READINGS · 1 SCREEN LAB-GRADE SENSORS 3000 mAh · 6–8 HRS DATA EXPORT TO PC 1-YEAR WARRANTY What Your Nose Can't Tell You
Most home air quality problems are invisible and odorless — which is exactly why they get dismissed as "just being tired." Here's what a PM2.5 & CO₂ monitor actually catches.
"I sleep 8 hours and still wake up foggy."Your bedroom CO₂ triples overnight
With the door and windows shut, carbon dioxide builds up all night. By morning a closed bedroom can easily pass 2,000 ppm — roughly 5× outdoor levels. Elevated CO₂ is tied to headaches, poor concentration and restless sleep. The M2000 shows the number live, so you know exactly when to crack a window. Real-time CO₂ monitor readings, not guesswork.
"The wildfire is 40 miles away — why are my eyes itching?"Smoke doesn't stay outside
Wildfire smoke carries PM2.5 particles small enough to slip through window frames, door gaps and older HVAC filters. During an air quality alert, indoor PM2.5 often hits "Unhealthy" while the sky looks merely hazy. Put the M2000 next to your air purifier and watch the number drop — that's proof your filter is actually working.
"We moved in three months ago and it still smells new."Formaldehyde off-gasses for years
New sofas, engineered hardwood, cabinets, paint and adhesives release formaldehyde — and it can keep off-gassing for 3 to 15 years. The EPA classifies it as a probable human carcinogen. The M2000's Dart electrochemical HCHO sensor resolves down to 0.001 mg/m³, so you can tell whether "new house smell" is fading or getting worse.
"I spent $400 on an air purifier. Is it doing anything?"Stop guessing — start measuring
Test the air right at the purifier's intake, then walk to the far corner of the room. The gap between those two numbers is your real clean-air delivery rate. Same trick works for HVAC filters, kitchen exhaust hoods, humidifiers and dehumidifiers — the M2000 turns "I think it helps" into a number you can act on.
Five Readings. One Screen. Zero Setup.
Everything that matters for indoor air quality at home — visible at a glance, updated in real time.
PM2.5 — Fine Particles
Smoke, cooking fumes, dust and vehicle exhaust. The 2.5-micron particles that reach deep into your lungs and bloodstream.
PM10 — Coarse Particles
Pollen, pet dander, mold spores and road dust — the usual triggers for allergy and asthma flare-ups at home.
CO₂ — Carbon Dioxide
The single best proxy for ventilation. If CO₂ is climbing, so is everything else you exhale — and so is drowsiness.
HCHO — Formaldehyde
Off-gassing from new furniture, flooring, cabinets and paint. Detectable at 0.001 mg/m³ — far below what you can smell.
Temperature & Humidity
Mold grows above 60% RH; dry air below 30% irritates airways. Keep both in range and you keep the whole room healthier.
Audible Alarm + Data Export
Set your own thresholds and get an audible alert. Export the log to your PC to see what happened while you slept.
Three Sensors. No Compromises.
Cheap air quality testers use one generic sensor and estimate the rest. The M2000 2nd Gen uses three independent, purpose-built sensors — one for each gas and particle class.
PARTICLESTemtop Laser PM2.5 Sensor
Upgraded to the 4th generation. Particles pass through a professional light source from QSI, combined with Mie scattering principles and a smart particle-inversion algorithm to determine multi-channel concentrations of PM2.5, PM10 and TSP.
CO₂SenseAir NDIR CO₂ Sensor
Using NDIR (non-dispersive infrared) gas sensing technology based on the Lambert–Beer absorption law, paired with a built-in CO₂ gas-fingerprint algorithm, to determine carbon dioxide concentration — the same sensing method used in commercial HVAC demand-control ventilation.
FORMALDEHYDEDart Electrochemical HCHO Sensor
Formaldehyde gas passes through an electrolyte and triggers a controlled chemical electrode reaction. A built-in algorithm converts that electrical signal into a precise formaldehyde concentration value — sensitive enough to catch the slow off-gassing from new furniture and flooring.
Good to know: The HCHO and CO₂ sensors can be re-calibrated at any time — press the Menu button, then select Calibration Zero. Fresh air, fresh baseline. Specifications
Model M2000 2nd Generation — full technical detail.
GeneralModelM2000 2nd GenerationDimensions8.8 × 2.8 × 1.4 inBattery Capacity3000 mAhBattery Life6–8 hours on a full chargeInputDC 5V / 1AOperating Environment0–50°C (32–122°F), 0–90% RHMeasurement Ranges & AccuracyPM2.5 Measuring Range0–999 μg/m³ · Resolution 0.1 μg/m³PM2.5 Accuracy±10 μg/m³ (0–100 μg/m³); ±10% (>100 μg/m³)PM10 Measuring Range0–999 μg/m³ · Resolution 0.1 μg/m³PM10 Accuracy±15 μg/m³ (0–100 μg/m³); ±15% (>100 μg/m³)CO₂ Measuring Range0–5000 ppm · Resolution 1 ppmCO₂ Accuracy±50 ppm + 5% of readingHCHO Measuring Range0–2 mg/m³ · Resolution 0.001 mg/m³HCHO Accuracy±0.03 mg/m³ (0–0.3 mg/m³); ±10% (>0.3 mg/m³)Compare the Temtop Lineup
Not sure which model fits your home? Here's every sensor, side by side.
LKC-1000ELKC-1000SLKC-1000S+ 2ndM2000CM2000M2000 2ndPM2.5 & PM10✓✓✓✓✓✓HCHO & Alarm———✓✓✓Data People Actually Use It
One meter, every room that matters.
Nursery & Kids' Rooms
Infants breathe faster and are more vulnerable to PM2.5 and formaldehyde. Check the nursery before bedtime — every night.
Master Bedroom
Log CO₂ overnight and find out whether your "always tired" mornings are actually a ventilation problem.
Home Office
Afternoon brain fog? Closed-door offices routinely hit 1,500+ ppm CO₂. Open a window and watch it fall.
New Construction & Renovation
Track formaldehyde off-gassing for weeks after new cabinets, flooring or paint go in. Know when it's safe.
Wildfire Season
Verify your air purifier and HVAC filter are actually keeping indoor PM2.5 out of the "Unhealthy" range.
Classrooms & Small Offices
Packed rooms spike CO₂ fast. Show the number on the desk and ventilation stops being an argument.
About Temtop How we got our start
Temtop was founded in 1996 and is headquartered in California, built around the fast-growing environmental monitoring market.
What makes our products unique
We've spent decades focused on one thing: environmental particulate and gas monitoring. Our international technical team operates in a global R&D cooperation environment, which is why the M2000 line uses sensors from QSI, SenseAir and Dart rather than generic off-the-shelf parts.
Why we love what we do
So everyone can know the air — and breathe freely.
Temtop M2000 2nd Generation Indoor Air Quality Monitor · PM2.5 / PM10 / CO₂ / HCHO / Temp & Humidity
