The equipment we offer varies in its levels of accuracy from very basic up to scientifically accepted. Generally the level of accuracy is reflected in the price. Bearing in mind that it is often trend, such as with a barometer, rather than absolute accuracy that is important it is up to each user to decide what will be acceptable in terms of accuracy and consistency. Very often it is more imortant that sensor readings used to collect data for another process are consistant and linear rather than precisely accurate.

Consumer products often state resolution which should not be confused with accuracy. For consumer products accuracy in the range of say ±5% within the mid range for any given value might be considered normal. Bear in mind though that an accuracy of ±1ºC could result in a discrepancy of 2ºC between 2 sensors each being within that range but either side of a correct value.

Generally equipment manufactured to a level of accuracy will be backed by a conformance standard so that you know each and every product is manufactured and factory set to the standard that achieved the stated accuracy i.e. NIST for Davis Instruments. Most such equipment is calibrateable if you wish, something that can be carried out (in the UK) by a UKAS test house. Bear in mind though that there is little point in sending something like a barometer for calibration when it will be returned to you "up hill and down dale" only for you to adjust it for altitude when it arrives back!