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Formaldehyde Detector & Indoor Air Quality Monitor

Know the room
is safe. Then rest.

The new furniture, the fresh paint, the room you just finished. It can look perfect and smell fine, and still hold more formaldehyde than health guidelines recommend. You can't see it or smell it, but FORMISENSE™ puts a number on it in about a minute, so you stop wondering and start breathing easy.

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Formaldehyde (HCHO)

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TVOC

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PM1.0, PM2.5 and PM10

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Temperature and humidity

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Real-time LCD display

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USB-C rechargeable

Find out what you're breathing →

Free U.S. shipping · 30-day returns · Secure checkout

Formisense detector on a home office desk

Check bedrooms, nurseries, home offices, kitchens and newly furnished rooms from one easy-to-read LCD screen.

What it measures

7 measurements. One monitor.

FORMISENSE™ gives you a broader view of your indoor environment without juggling several separate devices.

Formaldehyde (HCHO)

Monitor formaldehyde concentration in real time. Detection range: 0.000 to 1.99 mg/m³.

TVOC

Watch total volatile organic compound readings, a combined measurement rather than a list of individual VOCs.

PM1.0

Monitor very fine airborne particulate matter.

PM2.5

Track fine airborne particles about 2.5 micrometers or smaller.

Formisense formaldehyde and air quality detector

PM10

Monitor larger inhalable particles alongside PM1.0 and PM2.5.

Temperature

See your room temperature directly on the display.

Humidity

Monitor relative humidity alongside your other indoor air readings.

Source: US EPA, sources of indoor particulate matter

One screen. More information about your room.

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Family relaxing at home with the Formisense formaldehyde detector on the coffee table

Illustrative photo.

The nursery looked perfect. So it's fine now, right?

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New furniture arrived

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You unpacked a new mattress

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The nursery was freshly painted

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New flooring went down

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You cleaned the house

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You lit a candle

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You moved into a newly built or renovated home

You finished it on a Sunday. The crib, the dresser, the soft paint on the walls. You stood in the doorway and felt proud, and you caught that faint chemical smell new furniture has. By Wednesday it was gone. So the air is fine now.

Here is the uncomfortable part. Your nose stops noticing a smell within minutes, but formaldehyde is invisible and, at the levels that actually matter for health, has no smell at all. New furniture, paint and flooring can keep releasing it for weeks or months, often in the very rooms where your family sleeps. The room can look perfect, smell perfect, and still be worth checking.

Source: US EPA

Not a guess. Not a fading smell. A number you can act on, tonight.

See what's in my air →

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A formaldehyde detector for the rooms you actually live in

Indoor air can vary throughout your home. Carry FORMISENSE™ from room to room and compare formaldehyde, TVOC, particulate matter, temperature and humidity readings across the spaces where you live, work and sleep.

1

Measure

2

Compare

3

Ventilate or make changes

4

Check again

One detector. Check every room.

Check this room →

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Real life, real rooms

Check your air after everyday moments

The moments that change a room are often the ones you'd never think to question.

New furniture

New furniture? Check the room.

That \u{201C}new furniture\u{201D} smell tells you something changed. It does not tell you the concentration in the air. Pressed-wood furniture, cabinets, adhesives and some coatings can release formaldehyde and other VOCs indoors.

FORMISENSE™ lets you monitor the room directly, so you can look at the HCHO reading instead of relying on smell.

Source: US EPA

Place it. Read it. Compare it. Check again.

New mattress

Just unboxed a new mattress?

Check the bedroom, not just the label.

Your bedroom contains more than a mattress. Furniture, flooring, paint, adhesives and cleaners can all contribute to the indoor environment.

Place FORMISENSE™ in the bedroom to monitor HCHO, TVOC, particulate matter, temperature and humidity, then move it to another room and compare.

Know more about the room where you spend every night.

Nursery

Setting up a nursery?

The room looks ready. Now check the air.

You chose the crib, built the dresser, painted the walls and added a rug. FORMISENSE™ gives you one more thing to check: the indoor air.

Place the monitor in the nursery to view formaldehyde, TVOC, particulate matter, temperature and humidity, and make it part of your routine after new furniture or painting.

Information you can see. In a room that matters to you.

Moving in

Moving into a new home?

Check before you finish unpacking.

New homes and recently renovated spaces can contain new flooring, cabinetry, paint, adhesives and furnishings.

Walk FORMISENSE™ through the bedroom, nursery, office, living room and renovated spaces. Note what you see and compare the rooms.

Start your new home with information, not assumptions.

Cooking

What happens to your air when you cook?

Indoor particulate matter can increase during cooking, and cooking methods affect how much is produced. Using an outdoor-vented range hood when available can help reduce indoor PM from cooking.

Check your kitchen before cooking, again while cooking, then watch what happens after you ventilate.

Source: US EPA

It turns something invisible into something you can observe.

Candles

What happens when you burn a candle?

Candles can generate indoor particulate matter. So can fireplaces, some cooking and other forms of combustion.

With FORMISENSE™, you can watch your particulate readings before, during and after everyday activities instead of assuming what happened.

Source: US EPA

Real life. Real room. Real-time readings.

Cleaning

Clean house. But what's in the air?

Cleaning products can contain volatile organic compounds that may be released during use and, in some cases, while stored. That doesn't mean you should stop cleaning. It means ventilation and product directions matter.

Check before cleaning, check afterward, ventilate according to the product instructions, then check again.

Source: US EPA

A simple way to see how everyday chores affect your air.

Home office

Working from home?

You monitor your screen all day. What about the room around it?

Desks, shelving, office furniture and printers can all be part of your indoor environment. EPA lists office equipment such as printers and copiers among potential indoor sources of VOCs.

Keep FORMISENSE™ on your desk and view HCHO, TVOC, PM1.0, PM2.5, PM10, temperature and humidity. No phone required to see your current readings.

Source: US EPA

Know more about the room where you spend your workday.

Monitor my home →

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How it works

How does FORMISENSE™ work?

Check your indoor air in three simple steps.

1

Charge the monitor

Charge FORMISENSE™ through its USB Type-C port. The supplied specifications state about 4 hours for a full charge.

2

Place it in the room

Switch it on and place it where airflow around the device isn't blocked. Give the sensors time to respond and stabilize according to the operating instructions.

3

Read and compare

View the measurements on the LCD display, then try another room and compare. Repeat after activities or changes in the space.

That's the advantage of a portable home air quality monitor.

Start checking my air →

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Reading your results

What does a formaldehyde reading mean?

FORMISENSE™ reports formaldehyde in mg/m³. The World Health Organization published an indoor air guideline for formaldehyde of 0.1 mg/m³ over a 30-minute period, which gives you useful context for your reading.

FORMISENSE™ is a consumer monitoring device, not a certified laboratory analysis. If a reading remains concerning, or you need a legally or professionally validated measurement, consider confirmatory testing through a qualified professional or laboratory.

Your formaldehyde reading

What it means

Below 0.1 mg/m³

Within the WHO indoor air guideline. Keep ventilating as usual and check again after changes like new furniture or painting.

0.1 mg/m³ or higher

Above the WHO guideline. Improve ventilation, look for likely sources in that room and check again. If readings stay high, consider professional testing.

Home monitoring helps you observe. Professional testing can confirm.

Source: WHO Guidelines for Indoor Air Quality: Selected Pollutants

Indoor air 101

Your indoor air questions, answered

What is formaldehyde?

Formaldehyde, also called HCHO, is a colorless gas that can be emitted by materials and products found inside homes. EPA identifies pressed-wood products made with certain adhesives, such as particleboard, MDF, plywood, furniture and cabinetry, as important potential household sources.

That's why people often look for a formaldehyde detector for home use after buying new furniture, renovating, installing cabinetry or moving into a newly built home.

Source: US EPA

What is TVOC?

TVOC means total volatile organic compounds. VOCs are gases emitted from many solids and liquids, including paints, varnishes, cleaning products, air fresheners, furnishings, building materials and office products.

A TVOC monitor gives an overall indication of VOC activity. It does not identify every individual chemical present.

Source: US EPA

What are PM1.0, PM2.5 and PM10?

PM stands for particulate matter, tiny particles suspended in the air. FORMISENSE™ monitors three particle-size categories: PM1.0 (very fine particles), PM2.5 (fine particles approximately 2.5 micrometers or smaller) and PM10 (larger inhalable particles).

Cooking, candles, cleaning activities and outdoor pollution can contribute to indoor particulate matter. EPA confirms that indoor PM can come from both outdoor sources and activities inside the home.

Source: US EPA

Why monitor temperature and humidity too?

Temperature and humidity describe the conditions in which your other measurements are taken. FORMISENSE™ displays both in real time alongside its air quality readings, so you don't need a separate thermometer or humidity display.

Seven useful measurements. One portable device.

See the invisible.

Indoor air quality can be confusing because many pollutants can't simply be seen, and smell alone isn't a reliable measuring instrument.

FORMISENSE™ puts actual readings in front of you.

Not a feeling. Not a guess. A measurement you can observe, compare and track.

Check my indoor air →

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Designed to go where you go.

FORMISENSE™ measures about 151 × 69 × 45 mm, so it's easy to carry from one space to another. Take it along whenever you want more information about another indoor space.

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Bedroom

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Nursery

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Living room

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Kitchen

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Home office

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Basement

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Garage

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New apartment

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Recently renovated room

The room changes. Your monitor comes with you.

Two rooms, two monitors

Keep one where it matters most.

You can move one FORMISENSE™ from room to room, but sometimes convenience matters. Keep one in your bedroom or nursery and a second in your office, living room or another frequently used space.

Add a second FORMISENSE™ for your bedroom, nursery or home office.

Add a second monitor →

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Get yours

FORMISENSE™ product specifications

Everything you need to know before you order.

FORMISENSE™ Professional Formaldehyde & Indoor Air Quality Monitor

$86.94

Free U.S. shipping

Product

FORMISENSE™ Professional Formaldehyde & Indoor Air Quality Monitor

Display

LCD

Measurements

Formaldehyde (HCHO), TVOC, PM1.0, PM2.5, PM10, temperature and humidity

Formaldehyde range

0.000–1.99 mg/m³

Formaldehyde sensor

Electrochemical (per supplied specifications)

Air sampling

Air-convection system

Battery

1200 mAh rechargeable lithium, about 2 hours per charge

Charging

USB Type-C, about 4 hours to full

Dimensions

151 × 69 × 45 mm

Additional functions

Air quality recording and analysis, calibration memory (per supplied specifications)

Add to cart →

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FAQs

Frequently asked questions about FORMISENSE™

Quick answers about the monitor, its readings and your order.

More questions? Email info@oniflame.com

A home formaldehyde detector can provide an indicative HCHO measurement directly in the room you want to check. Place the monitor according to its instructions, let the reading stabilize, note the concentration and repeat in other rooms or after changes to the space. A consumer monitor is useful for observation and comparison, while certified or professional testing should be used when validated results are required.
The World Health Organization recommends that indoor formaldehyde not exceed 0.1 mg/m³ over a 30-minute period. FORMISENSE™ can help you observe and compare indoor readings, but a consumer monitor does not replace certified laboratory or professional testing.
FORMISENSE™ monitors formaldehyde (HCHO), TVOC, PM1.0, PM2.5, PM10, temperature and humidity. The measurements appear on its built-in LCD display.
Yes. According to the supplied product specifications, FORMISENSE™ includes an electrochemical formaldehyde sensor. Its listed HCHO detection range is 0.000 to 1.99 mg/m³.
HCHO is the chemical formula commonly used for formaldehyde. FORMISENSE™ shows its formaldehyde measurement in mg/m³.
TVOC stands for total volatile organic compounds. It is an aggregate indication of the volatile organic compounds detected by the sensor, not a measurement that identifies every individual chemical.
Yes. The device is specified to monitor PM2.5 as well as PM1.0 and PM10 particulate matter.
Yes. Temperature and relative humidity are displayed alongside its air quality measurements.
Common places to check include bedrooms, nurseries, offices and rooms with new furniture, cabinetry, flooring, paint or renovation materials. Follow the placement instructions supplied with the monitor and avoid blocking airflow around its sensors.
New pressed-wood furniture and cabinetry can be sources of formaldehyde, so checking a room after adding new furnishings can give you useful information about your indoor environment. EPA identifies pressed-wood products as important potential sources of formaldehyde in homes.
Yes. Paints, building materials, furnishings and other renovation products can emit VOCs, which makes newly renovated spaces a relevant place to monitor indoor air.
Yes. Cooking can generate indoor particulate matter, and monitoring before, during and after cooking can help you see how your readings change. EPA recommends using an appropriately vented range hood where available to reduce indoor PM from cooking.
No. FORMISENSE™ should not replace required smoke alarms or carbon monoxide alarms. Consumer air quality monitors only detect what their sensors are designed to measure, and EPA cautions that low-cost air monitors are not substitutes for emergency smoke or carbon monoxide alarms.
No. FORMISENSE™ is a consumer indoor air monitoring device. It is not intended to diagnose, prevent, treat or cure any medical condition.
No. Home monitors are useful for observing readings, comparing locations and watching for changes, but they don’t provide the same validated results as certified laboratory or professional testing.
The supplied specifications list a 1200 mAh rechargeable lithium battery with about two hours of operation per charge.
FORMISENSE™ charges through USB Type-C. The supplied specifications list about four hours for a full charge.
No app is required to view the measurements. Current readings appear directly on the FORMISENSE™ LCD screen.
Yes. The handheld design lets you move FORMISENSE™ between rooms and compare measurements. If you want a monitor available in two spaces without moving it, you can add a second unit.
No. Shipping is free on orders to the United States, and you’ll receive a tracking number once your order ships.
You can return an item within 30 days of delivery, in its original condition and packaging. Email info@oniflame.com with your order number to start. If an item arrives damaged, defective or incorrect we cover return shipping; otherwise return shipping is yours. Full details are in our Refund and Returns Policy.
We accept major credit and debit cards and Link, processed securely by Stripe.

A clearer picture of your indoor air starts here.

Formaldehyde. TVOCs. Airborne particles. Temperature. Humidity. See seven useful measurements from one portable monitor.

HCHO · TVOC · PM1.0 · PM2.5 · PM10 · Temperature · Humidity

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Check the bedroom

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Check the nursery

✓

Check the office

✓

Check the kitchen

✓

Check after new furniture, painting, cleaning or renovations

Know your air. Know your home.

Check my indoor air →

Free U.S. shipping · 30-day returns · Secure checkout

What is FORMISENSE™?

FORMISENSE™ is a portable formaldehyde detector and indoor air quality monitor for home use. It measures formaldehyde (HCHO), TVOC, PM1.0, PM2.5, PM10, temperature and humidity and displays the readings on an LCD screen. It can be used to check bedrooms, nurseries, kitchens, home offices and newly furnished or renovated rooms.

Sources: US EPA, formaldehyde and indoor air quality; US EPA, sources of indoor particulate matter; US EPA, VOCs and indoor air quality; US EPA, low-cost air monitors; WHO Guidelines for Indoor Air Quality: Selected Pollutants.

Free US shipping

On every order to the United States

Secure checkout

Cards and Link, processed securely by Stripe

30-day returns

Return any item within 30 days of delivery

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