Tachometer à¤Ã×èͧÇÑ´¤ÇÒÁàÃçÇÃͺ ÁÔàµÍÃìÇÑ´Ãͺ ÇÑ´Ãͺ rpm à¤Ã×èͧÁ×ÍÇÑ´Ãͺ à¤Ã×èͧÇÑ´¤ÇÒÁàÃçÇÃͺ ÇÑ´Ãͺ´Ô¨ÔµÍŠࡨì à¤Ã×èͧÇÑ´Ãͺ ࡨìÇÑ´Ãͺ Speed Motor à¤Ã×èͧÇÑ´ÃͺÁÍàµÍÃì à¤Ã×èͧÇÑ´Ãͺ´Ô¨ÔµÍÅ RPM Meter > Extech RPM-10 à¤Ã×èͧÇÑ´ÃͺẺÊÑÁ¼ÑÊ / áʧ Combination Contact/Laser Photo Tachometer à¤Ã×èͧÇÑ´ÃͺẺÊÑÁ¼ÑÊ / áʧ + IR Thermometer Combination Tachometer + IR Thermometer Photo/Contact Tachometer includes a non-contact IR Thermometer for surface temperature measurements Built-in IR thermometer with laser measures remote surface temperature on motors and rotating parts Provides wide RPM (photo and contact) and Linear Surface Speed (contact) measurements Non-contact Photo tachometer uses a Laser for greater measuring distance up to 6.5ft (2m) Characters on display reverse direction depending on mode Double molded housing pecifications: Display counts: 99,999 count LCD Range RPM: Photo: 10 to 99,999 / Contact: 0.5 to 20,000 ft/min: 0.2 to 6560 (contact only) m/min: 0.05 to 1999.9 (contact only) Basic Accuracy: ±(0.05%rdg+1 digit) Max RPM Resolution: 0.1rpm Temperature Range (IR): -4 to 600°F (-20 to 315°C) Dimensions: 8.5x2.6x1.5" (216x66x38mm) Weight: 10.6oz (300g) Tachometer à¤Ã×èͧÇÑ´¤ÇÒÁàÃçÇÃͺ ÁÔàµÍÃìÇÑ´Ãͺ ÇÑ´Ãͺ rpm à¤Ã×èͧÁ×ÍÇÑ´Ãͺ à¤Ã×èͧÇÑ´¤ÇÒÁàÃçÇÃͺ ÇÑ´Ãͺ´Ô¨ÔµÍŠࡨì à¤Ã×èͧÇÑ´Ãͺ ࡨìÇÑ´Ãͺ Speed Motor à¤Ã×èͧÇÑ´ÃͺÁÍàµÍÃì à¤Ã×èͧÇÑ´Ãͺ´Ô¨ÔµÍÅ RPM Meter > Extech RPM-10 à¤Ã×èͧÇÑ´ÃͺẺÊÑÁ¼ÑÊ / áʧ Combination Contact/Laser Photo Tachometer à¤Ã×èͧÇÑ´ÃͺẺÊÑÁ¼ÑÊ / áʧ + IR Thermometer