A simple and very cost-effective way to meet government standards and ensure that your workforce can smell the odor of natural gas. Industrial workers in hazardous environments or in situations where smell warning is essential should be evaluated for smell function regularly. Self-administered micro-encapsulation technology allows testing of dozens of subjects at the same time. Obtain results in less than 10 seconds! Test odors are natural gas, mint and pineapple. Available in 3 odor configurations.