Hazardous gases can be a real danger in the home and workplace but there are various different gas detectors covering all the dangerous gases you may find. As well as gases that can cause explosions or fires, there are other deadly dangers from poisonous gases in the home. Carbon monoxide and radon are both referred to as “silent killers” as they are impossible to detect without a gas sensor, below are some great recommendations as to gas detection kit that you can buy today to keep your home, office or school safe from these killers.

The hazardous gas detectors shown below are calibrated under laboratory conditions to ensure that they are accurate and reliable.

#5 Kidde KN-COPP-3 Carbon Monoxide Alarm


Carbon monoxide poisoning is one of the main causes of domestic accidental death by poisoning in America but it can easily be prevented in your home by installing this Kidde KN-COPP-3 Carbon Monoxide Detector. CO gas levels can reach deadly levels without you realising it as it is an odorless, colorless gas which can be released by domestic appliances and office equipment. CO poisoning symptoms are difficult to spot and can often go undetected, being similar in nature to common illnesses like the flu. It is therefore essential to have at least one CO monitor/alarm system in place in your home – and indeed it is now compulsory in some areas. This unit plugs directly into your AC power outlet and has a battery back up which takes over automatically in the event of a power failure. Carbon monoxide levels are monitored continuously and you can see in an instant what they are on the digital display, a loud beeping alarm will sound if a dangerous level of gas is reached.


#4 UEi Test Instruments CD100A Combustible Gas Leak Detector


The UEi Test Instruments CD100A Combustible Gas Leak Detector is a professional standard instrument designed for service engineers to enable them to detect combustible gas leaks in the home and commercial premises. But at an average cost of $100 to call out a plumber or furnace repair man, the unit pays for itself in one use. This gas detecting device will pinpoint even the smallest leak, right down to which side of a joint the leak is on – even when the use of more traditional methods prove ineffective. If you use any of acetone, benzene, butane, propane, toluene, methane, ethylene, gasoline, halon, hydrogen sulfide, solvents, thinners, or refrigerants remember that there are no safety circuit breakers to trip like you would get in an electrical system. The detector is simplicity itself to use, there’s nothing complicated to try and work out, just switch it on and listen for an increase in tick rate.


#3 TIF Instruments TIFXL-1A Refrigerant Leak Detector



Refrigerant Leakage is a very serious hazard in commercial and industrial premises where refrigerators are used and to a lesser extent in the home. Indeed because of the dangers of refrigerant gases getting into the atmosphere, all refrigeration equipment needs to be properly disposed of. The TIF Instruments TIFXL-1A refrigerant leak detector can detect all halogenated refrigerants, including fluorine and is part of the new range of gas leakage equipment with the brand “Generation X”. The company says that they have completely redesigned the instrument both aesthetically on the outside and internally with a new microprocessor based operating system. The redesigned sensor tip gives increased sensitivity and reliability and sends 2000 signals per second back to the internal computer. This machine has had some very positive reports from customers and is our top rated refrigerant detector.


#2 Bacharach Leakator Jr 0019-7075 ABS Plastic Combustible Gas Leak Detector

Our runner-up selection in the gas monitoring section is the Bacharach Leakator Jr. Combustible gases such as butane, methane, acetylene and those given off by gasoline, paint thinners, solvents etc are any gas that can cause fire or explosion and can obviously be deadly in the home or workplace. This is a very compact and portable combustible gas meter at only 6 inches long, but coming complete with a 12″ extension hose for extended reach to check for small pockets of gas in awkward, hard to reach spots. Featuring dual sensitivity for detecting gas in the wider area then pinpointing a leak in a pipe for example. A fully portable unit, the Leakator gas indicator is simplicity itself to use and can pinpoint large or small leaks whilst needing no calibration whatsoever.


#1 Corentium Home Radon Detector by Airthings 223Corentium Home Radon Detector by Airthings 223 


Radon gas is known as the silent killer and the Corentium Radon Gas Detector will help to protect you, your family and your workplace from its dangers. Radon is a radioactive gas that is given off naturally from rock and gets into houses at the lowest points – for example foundations, water pipes, cracks in walls at low level and cavity wall insulation. One of the problems of modern very highly energy-efficient houses is the lack of ventilation, this can lead to a build-up of radon as the gas lies at low level and once it is in the house does not have a means of escape. Good radon gas testing kit is essential to detect dangerous levels of the gas and allow you to keep your family safe. This instrument is the most advanced electronic radon gas detector available as a handheld unit at an affordable price. Don’t take a chance with potentially dangerously high levels of radon in your home, in your school or in your workplace when the Corentium lets you monitor average radon levels over 1 day, 7 days and a year – all at the same time. This is a very accurate machine with only a 5% error band and is extremely energy efficient – it will run for up to 3 years on one set of batteries. Recalibration isn’t a problem either as it is not required for the whole lifetime of the meter. Another big plus point is the simplicity of use, you literally don’t need to do anything other than insert the batteries and press the reset button for the monitor to display all the information you need. Other radon testing equipment is single use but with this kit you can reset it and reuse, saving a lot of money against the cost of expensive professional radon testing services.



The purpose of stereo microscopes in general is to enhance resolution, this can apply to an object or image under the scope. A stereo microscope (also known as a dissecting microscope) uses two separate optical paths to give different viewing angles to the left and right eye, resulting in a 3D image of the sample. This type of image is essential for a wide range of industries including watch-making, electronic circuit boards, dissection and microsurgery, the medical industry. Stereo microscopes are also widely used in engineering, biology, forensics, and scientific labs
Other types of microscope available are digital, which use a monitor to display the image rather than looking through a lens and the compound microscope, which use a “compound” optical system consisting of an eyepiece and objective lens.

There are a wide range and variety of features and specifications across our choices, so you are sure to find something that suits you. The following are our top 5 currently available on Amazon.

Let’s start with #5…

#5 AmScope SM-3BZ-80S 3.5X-90X Boom Stand Binocular Zoom Stereo Microscope on Boom + 80 LED Light


Our first choice is the AmScope SM-3BZ-80S Binocular Zoom Stereo Microscope with 3.5X-90X Boom Stand and is priced towards the middle end of the price spectrum. It represents excellent value for money, being heavily discounted at less than a third of its retail value of $1600. This microscope has some great features and its 3.5X-90X continuous zoom power is more than most instruments in the same price range. It has a super wide field of view (2-1/2″ 65mm) and high resolution, with sharp, clear images and a large 26:1 zoom range. Illumination is provided by 60 LEDs and is bright and even as well as being surprisingly cool. This microscope is perfect for use in the electronics and semiconductor industries as well as engravers, scientists and researchers.


#4  AmScope SE306R-AZ-E2 Digital Forward-Mounted Binocular Stereo Microscope, WF10x and WF20x Eyepieces, 20X/40X/80X Magnification, 2X and 4X Objectives, Upper and Lower Halogen Lighting, Reversible Black/White Stage Plate, Arm Stand, 120V, Includes 2MP Camera and Software

Our next pick is the AmScope SE306R-AZ-E2 20X-40X-80X Digital Binocular Stereo Microscope. It offers a broad field of view with high resolution and good depth and has a special feature in that it comes complete with a 2 Megapixel digital camera (USB). As well as taking still images, the camera can stream video onto a computer (Mac/Windows). Magnification power setting is adjustable between three settings, 20X, 40X and 80X and there is a choice of illuminating the object from the top (incident) for three-dimensional objects or bottom (transmitted) for viewing slides. This is a highly versatile stereo microscope which is great for examining any 3D object, from electronic components, plants, rocks and insects to jewelry and coins and stamps. Whilst being perfect for use in the geology, archaeology, forestry and biology industries it is also highly suilable for use in schools and hospitals.


#3 Celestron 44202 Advanced Stereo Microscope


Next up is the Celestron Advanced Stereo Microscope which has the power to create incredibly realistic three dimensional images. This awesome piece of equipment uses two distinct light paths and two eyepieces to achieve amazing images in life-like 3D. This machine is for the advanced low power user but at a price that will suit most budgets and comes complete with two 10x wide field eyepieces giving 20mm field of view, as well as both 2X and 4X object lenses. Magnification options are 20X and 40X power and there is both top and bottom illumination from the halogen lights. The viewing head lets you view in any position thanks to its 360 degree rotation and the binocular head is inclined for maximum comfort. Again this scope has a wide variety of uses, including being excellent for die making, watchmaking, engraving, jewelry making/repairing, stamps and coin collectors/dealers, students and scientists.

#2 AmScope SE400-Z 10X-20X Widefield Binocular Inspection Stereo Microscope on Boom Arm Stand


The AmScope SE400-Z has proved to be one of the most popular stereo microscopes on the market and ranks very highly in terms of customer satisfaction. Although a more basic instrument than some others in the review, this scope is ideal for use in industries like soldering, dental services and circuit board repair. Magnification levels of 10X and 20X are achieved through two sets of widefield eyepieces and one objective lens and the instrument can be adjusted to suit veariations in the eye. The user will have a comfortable experience in using the SE400-Z as it is set at the optimum 45 degree angle and has rubber eye guards to help prevent any eye strain. X- and Z-axis adjustment is provided by the head, mounted on a 12″ boom-arm stand and there is a 9″ working distance.


#1 AmScope SE306R-PZ 20x 40x 80x Home School Student Dissecting Binocular Stereo Microscope with Incident and Transmitted Dual Light Illumination System


Our number one selection is another AmScope model, the binocular pillar-stand SE306R-PZ. This dissecting binocular stereo microscope has three levels of magnification power – 20X, 40X and 80X and has both top and bottom illumination. The top (incident) lighting is used when you need the light to be shining down on a three dimensional object being viewed and the bottom ( transmitted) light is used for viewing slides on the stage plate. It is equally perfect for home school student use as it is in the many industrial and eductional environments it is used in. Its ability to examine the surface details of a wide range of materials such as metal, solder, semiconductor, wood and stone makes it an unbeatable choice for jewelers, watchmakers, engravers as well as schools, colleges and hospitals. This is a high quality microscope at a very affordable price and comes brand new and factory sealed in the box.


Some of the terms used in the above reviews are:
Binocular – two eyepieces
Magnification – Size of an image
Resolution – Image clarity (determined by field of view / numerical aperture / working distance)
Fixed focus – Fixed distance between lens and image
LED / Fluorescent / Mirror / Halogen – Light sources for control of image viewing