Tun farkon karni na 18, micrometers sun shiga matakin masana'antu a cikin ci gaban masana'antar kayan aikin injin. Har wala yau, micrometer ya kasance ɗaya daga cikin ingantattun kayan aikin auna daidai a cikin bitar. Yanzu bari mu ga yadda aka haifi micrometer.
’Yan Adam sun fara amfani da ƙa’idar zaren don auna tsawon abubuwa a ƙarni na 17. A shekara ta 1638, W. Gascogine, masanin falaki a Yorkshire, Ingila, ya yi amfani da ka'idar zaren don auna nisan taurari. Daga baya, a cikin 1693, ya ƙirƙira wani ma'auni mai mulki da ake kira "caliper micrometer".
Wannan tsarin aunawa ne tare da zaren zaren da ke manne da keken hannu mai jujjuya a gefe guda da muƙamuƙi masu motsi a ɗayan. Ana iya samun karatun ma'auni ta hanyar kirga jujjuyawar keken hannu tare da bugun kiran karatu. Makon karatun bugun kira ya kasu kashi 10 daidai gwargwado, kuma ana auna tazarar ta hanyar motsa farantin aunawa, wanda ke fahimtar ƙoƙarin farko na ɗan adam don auna tsayi da zaren dunƙulewa.
Ba a samun ingantattun kayan aunawa na kasuwanci har zuwa ƙarshen karni na 19. Sir Joseph Whitworth, wanda ya ƙirƙira shahararriyar zaren "Whitworth", ya zama babban jigo wajen inganta kasuwancin micrometers. Brown & Sharpe na Kamfanin B&S na Amurka sun ziyarci baje-kolin kasa da kasa na Paris da aka gudanar a shekara ta 1867, inda suka ga na'urar mikromiter na Palmer a karon farko kuma suka dawo da shi Amurka. Brown & Sharpe sun yi nazarin micrometer da suka dawo da su daga Paris a hankali kuma sun ƙara wasu hanyoyi guda biyu a ciki: hanyar da za ta fi dacewa da sarrafa igiya da kuma kulle sandal. Sun samar da micrometer na aljihu a cikin 1868 kuma sun kawo shi kasuwa a shekara mai zuwa.
Tun daga wannan lokacin, an yi hasashen wajibcin micrometers a cikin bita na kera injina daidai, kuma an yi amfani da mitoci masu dacewa da ma'auni daban-daban tare da haɓaka kayan aikin injin.
