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Gas Types



RKI Portable Single Gas Monitors

RKI Instruments makes several single gas monitors that are great for a variety of gas detection programs and  each monitor is equipped to detect the presence of a single target gas, such as hydrogen sulfide, carbon monoxide, oxygen, ammonia, and combustibles that can cause a flash fire. If the worker needs to detect a range of gases, they will need to use a multi-gas detector instead.

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RKI Instruments GasWatch 3 CO/O2 Gas Personal Monitor 73-0026



RKI SC-8000 Hydrogen Peroxide Gas Monitor 73-0053-H2O2


How long are gas monitors good for?

The sensor on the single gas monitor should last between two to three years. Workers can replace the sensor to extend the life of their device. 

Select RKI portable gas monitors come with warranties that cover the cost of repairs. Users will need to bump test the device before each shift to ensure it’s working properly. If it fails the bump test, calibration will be necessary. We recommend calibrating at least every six months to ensure the device produces accurate readings. 

How much does a gas monitor cost?

Single gas monitors cost between $125 and $500, depending on the sensor and model. Small, compact devices tend to cost less than heavy-duty instruments. Some competing single gas monitors may cost less, but they typically won’t last as long.. Replacing this equipment may exceed the cost of buying a more durable monitor that will last for several years. 

Where should I place my gas detector?

Users should place their device in the breathing zone, or the ten-inch radius around a person’s nose and mouth, to ensure the monitor is taking in the same air the person is breathing. 

Most monitors come with a clip that makes it easy to attach the device to the person’s collar, lapel, or bag. RKI even has the GasWatch line where your single-gas monitors can be worn on your wrist. Workers can also clip the device to their hard hat to keep it out of the way. Every portable RKI monitor is lightweight and compact to keep workers mobile in the field.

Contact a PK Safety expert to find the right RKI gas monitor for the task at hand.