The new CSS Mini Mechanical Thermo-Hygrometer is for all practical purposes identical to that of the Arten Meter except it doesn't have the humidity strip at the bottom of the display. It is manufactured by the same company and has the same manufacturer's part number. The simple design, compact size, reliability, and accuracy of this unit made it popular with museums worldwide. It needs no batteries, is ideal for use in display cases, storage units, microclimate containers, music instrument cases and so much more where a compact design is desirable. Recalibration is made possible with two screw type adjusters on the back of the unit. Temperature measurement accuracy is ± 1 degree and RH measurement is accurate to within ± 5%. The dial on the left indicates temperature readings from -30 to 50°C or 10 to 110°F and the dial on the right indicates humidity from 0 to 100%. The unit's dimensions are 1-7/8" (48mm) in length x 1-1/8" (28mm) in height x 1/2" (13mm) in depth and is available in either Fahrenheit or Centigrade temperature versions.