・To show a belt performance of transmission belts,one of the most important thing is proper tension strength.
・"DOCTOR TENSION TYPE-Ⅳ" is contactless belt tension gauge measuring sound wave.You can measure belt easier than now

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This is a non-contact sonic belt tension meter. A small microphone reads the natural frequency of the belt and instantly displays the belt tension.
・Small microphone sensor: Measures the natural frequency of the belt.
・Liquid crystal display : Displays the data and measurement data set by the command key and data key. The measurement data displays the natural frequency (Hz) in the upper row and the tension (kgf or N) in the lower row. By pressing and holding the "0" and "Enter" keys at the same time when the power is turned on, the display can be switched between Japanese and English.
・Display unit changeover switch : Change the display unit (kgf or N) of the measurement data.
・Command key : Consists of CLR key, MEM key, LOAD key, and Enter key. Various settings are made in combination with data keys.
・Battery box : 2 included AA batteries are included.
・Microphone sensor insertion slot : With the arrow side written on the connector part of the microphone sensor facing forward, insert it firmly in the direction of the arrow as far as it will go.
・Power switch : Sets the power ON/OFF and sensitivity of the microphone sensor.
・Data key : Consists of 0 to 9 and a decimal point. Various settings are made in combination with the command key.
・AC adapter slot : Insert an AC adapter (sold separately).

・Various belts that can be measured
Various belts such as timing belts, flat belts, V-belts, and V-ribbed belts can be handled.
・The vibration frequency and tension value of the belt can be displayed at the same time.The
frequency and tension value can be checked on the same screen with the 2-line display.
・Two types of unit display can be selected.
[kgf] or [N] can be displayed with the unit selector switch.
・Wide measurement frequency range
A wide frequency range of 10.0 to 999 [Hz] (upper 3 digits) can be measured.
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High-performance one-chip microcomputer with unique high-speed data processing for short measurement time. (Minimum 0.5 seconds)
・Equipped with memory function
10 types of tension measurement data and 89 types of unit mass data can be stored.
・Equipped with an auto power off function
The power will automatically turn off after 5 minutes have passed since the last operation. This prevents battery consumption due to forgetting to turn off the power switch.
・Japanese/English switching is possible
By pressing and holding the "0" and "Enter" keys at the same time when the power is turned on, the display can be switched between Japanese and English.

Measurable frequency |
10.0~999[Hz] |
Measurement accuracy |
±1Hz(Less than 100[Hz] |
±1%(More than 100[Hz]) |
Setting date avaliable |
Unit mass |
0.0001~9.9999kg/m |
Blet width |
1.0~999.9[mm] |
Belt span length |
1~9999[mm] |
Number of rib |
1~99 |
Working temperature&Humidity |
-10℃~50℃,less than80% |
(Not use under condensation) |
Storage temperature&humidity |
-20℃~70℃,less than80% |
(Not use under condensation) |
Power source |
2 pieces of size AA battery |
Battery life |
About 30 hours |
Dimensions&weight |
13.5X96X160mm,240g |
Accessories |
2 pieces of size AA battery,1 piece of flexible microphone sensor |
Selling separately |
AC adapter,code type microphone sensor |