計(jì)時(shí)器的種類包括電磁打點(diǎn)計(jì)時(shí)器、電火花計(jì)時(shí)器、堅(jiān)持計(jì)時(shí)器、停車計(jì)時(shí)器、反應(yīng)計(jì)時(shí)器、放大計(jì)時(shí)器以及windows計(jì)時(shí)器等等。電磁打點(diǎn)計(jì)時(shí)器和電火花打點(diǎn)計(jì)時(shí)器最為常見(jiàn)。電磁打點(diǎn)計(jì)時(shí)器是一種使用交流電源的計(jì)時(shí)儀器，其工作電壓是4-6V，電源的頻率是50Hz，它每隔0.02s打一次點(diǎn)。電火花計(jì)時(shí)器是利用火花放電在紙帶上打出小孔而顯示出點(diǎn)跡的計(jì)時(shí)儀器，使用220V交流電壓，當(dāng)頻率為50Hz時(shí)，它每隔0.02s打一次點(diǎn)，電火花計(jì)時(shí)器工作時(shí)，指導(dǎo)運(yùn)動(dòng)所受到的阻力比較小，試驗(yàn)誤差比電磁打點(diǎn)計(jì)時(shí)器的要小。
FOTEK計(jì)時(shí)器 H3-3S DC24V  計(jì)時(shí)器 H3-口口、H3-M口口、H3-FK-M3、H3-TRD-30S、H2Y-口口、H3Y-口口、H5B-M口口、H5B-FK-M3、TM48-M口口、TM48-FK-M3、STPY/N-M口口、TDVY/N-M口口、MY-2P、MY-4P、SY-2D、SY-3D、H5T-4D、H5C-4D、H5M-4D
MY2J AC100/110 BY OMZ
MY2J AC110/120 BY OMZ
MY2J AC12 BY OMZ
MY2J AC200/220 BY OMZ
MY2J AC220/240 BY OMZ
MY2J AC24 BY OMZ
MY2J AC48 BY OMZ
MY2J AC50 BY OMZ
MY2J AC6 BY OMZ
MY2J DC100/110 BY OMZ
MY2J DC12 BY OMZ
MY2J DC24 BY OMZ
MY2J DC48 BY OMZ
MY2J DC6 BY OMZ
MY2J-CR AC100/110 BY OMZ
MY2J-CR AC110/120 BY OMZ
MY2J-CR AC200/220 BY OMZ
MY2J-CR AC220/240 BY OMZ
MY2J-D DC100/110 BY OMZ
MY2J-D DC12 BY OMZ
MY2J-D DC24 BY OMZ
MY2J-D DC48 BY OMZ