Cov hnyav plaub fab tso cai rau kev sib sau ua ke kom muaj kev nyab xeeb thiab muaj nyob rau hauv tus nqi nominal ntawm 1 kg, 2 kg, 5 kg, 10 kg thiab 20 kg, ua kom tau raws li qhov yuam kev siab tshaj plaws ntawm OIML chav kawm F1. Cov hnyav ci ntsa iab no lav qhov ruaj khov heev thoob plaws nws lub neej tag nrho. Cov hnyav no yog qhov kev daws teeb meem zoo tshaj plaws rau kev siv ntxuav thiab siv chav huv hauv txhua qhov kev lag luam.