Made In U.S.A.　　 美國製造   H-3震动转速表

These instruments are ideal for checking speeds of totally enclosed electrical equipment. Just hold the Tachometer against motor, turbine, pump, vacum cleaner, hair dryer or other similar equipment anywhere and read the speed.
These Tachometers are mounted in cases of cast aluminium alloy finished with black crackle enamel.　 Also available with bosses for permanent mounting.
Lowest possible speed is 600Rpm and the highest is 30,000Rpm.

H-3震动转速表是專門設計予量度一些*密封式的轉動型家庭電器. 在量度時, *把轉速錶緊貼在馬達, 引擎, 吸塵機或同類型之產品的外殼上 , 便可量出讀數 .
H-3震动转速表為裝設在一鋁合金內 , 堅固耐用.
H-3震动转速表轉數為 600轉 / 分, *高為 30,000轉 / 分 ; 視乎各型號的分別 .
NIST Traceable Certificate is optional.
可選購美國 NIST 國際認可証書.