- Connects to torque sensors that output deviation frequency signals, flex fuel sensors, etc.
- Set center frequency, rated torque, and rated frequency as desired, and display torque value and fuel concentration.
- CAN (1ms update), 16bit analog (0.1ms update), alarm output, etc. are available. [Option].
- Frequency deviation is displayed in %, and ⊿F measurement is also available.
| Input sensors with freq. deviation output |
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Torque sensor![]() |
Flex fuel sensor![]() |
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Input Pulse ・5V logic ・Zero cross ・12V logic |
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| Sensor power output ・12V/5V/others |
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| Calculation (Torque calculation/frequency deviation) ・ PeriomaticTM B method ・Moving average 99 max. ・Hold [Current/max./min./max. fluctuation range] ・Zero shift, span shift, 2nd range |
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TQ-4801![]() |
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| Power supply ・DC9.6-30V ・AC100-240V |
Setting ・Front button on main unit ・Special software LINKSHIP ・External setting unit PL-5A |
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| Output ・16bit analog ・Alarm ・CAN ・RS-485 ・Modbus ・USB |
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PC![]() |
PLC![]() |
Logger![]() |
Oscilloscope![]() |
Indicators, etc.![]() |
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| > View Case Studies |
| Flexible Measurement & Ch Customization |
| Available from Single Unit Orders |
| Convenient, Simple & Cost-effective |
| System-integrated Calibration |
| Modifications: Power Supply, Outputs, Comms |
| Calibration & Traceability Certs Available |
3-wire wiring greatly reduces wiring compared to BCD
Powerful error detection system for improved noise immunity and safety
| SAE J1939 [DLC 8 bytes or less] Customization experience available Please contact us for other customizations. |
RS-485, Ethernet (LAN) [Option]
Resolution 50,000 or more/Full scale and zero scale settings, output zero adjustment
Alarm output 1ms update [Option]1 to 4points
USB Type-C 1ms update [Standard] Data logging, setting
| 5V Logic |
| Zero cross |
| NPN open collector |
| 12V Logic |
| Customized signal |
| Input isolation |
| Line driver input |
| Trigger Level 0-9.99V |
| Hysteresis select |
| Pull-up ON/OFF |
| 5V |
| 12V |
| Other voltage* |
| *Please contuct us |
Maximum 99
[Option] HOLD, zero shift, etc.

(A) Operation indicator LED
(B) Front sheet button
- [In program mode] MODE, digit selection, numeric setting, ENTER
- [In measurement mode] Span shift, Zero shift
- Key lock: Prevents unintentional operation by field workers.




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| See more Applications > |
| Name | Torque meter [frequency deviation meter] | ||||||||
| Model | TQ-4801 | ||||||||
| Measuring method | PeriomaticTMB method Cycle calculation method | ||||||||
| Input | |||||||||
| Number of input | 1 point | ||||||||
| Input frequency | 0.0006Hz to 1.0MHz | ||||||||
| Resolution | Approx. 10.4ns (96MHz) | ||||||||
| Signal | 5V/12V logic, zero cross, NPN open collector, customized signal | ||||||||
| Input method | Single-phase signal | ||||||||
| General-purpose input | |||||||||
| Level/Sensitivity | Trigger level/Hysteresis | ||||||||
| 5V logic | 2.5V/±0.4V | ||||||||
| Zero-cross | 0V±/0.03V | ||||||||
| NPN open collector | 2.5V/±0.4V | ||||||||
| 12V logic | 6V/±0.4V | ||||||||
| Customized input | 0-9.0V/Small:±0.03V, Medium:0.4V, Large:±1.3V [trigger level 4.7V or lower], ±2.6V [trigger level 4.7V or higher] | ||||||||
| Input pulse | [Small] [Medium] 0.2 μs or more [Large] 0.3 μs or more, for both H and L levels | ||||||||
| Input resistance | 5V logic, zero cross, NPN open collector, and Input customized signal (trigger level 4.7V or lower): 10kΩ 12V logic, input customized signal (trigger level 4.71V or higher): 5kΩ |
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| Withstand voltage | ±30V *Inputs and outputs are not insulated for the general-purpose input option. | ||||||||
| Line driver input option | |||||||||
| Input signal | Line driver signal | ||||||||
| Withstand voltage | ±25V (differential voltage) | ||||||||
| Recommended line driver | Equivalent to AM26LS31 | ||||||||
| Termination resistance | 300Ω (standard specification) *Input and output are isolated for the line driver input option. | ||||||||
| Common items for each input | |||||||||
| Low-pass filter | OFF/500Hz/5kHz/120kHz/800kHz | ||||||||
| Trigger edge | Fall | ||||||||
| Input connector | Terminal block 7.62mm pitch M3 free terminal screw | ||||||||
| Sensor power supply output Option | [H] DC+12V±5% 60mA max/ [L] DC +5V±5% 150mA max | ||||||||
| Calculation | |||||||||
| Measurement mode | Custom (Torque) / Frequency meter / Period meter (seconds only) | ||||||||
| Calculation rate | Center frequency, deviation frequency at rating, rated torque, and output polarity are set for input frequency. | ||||||||
| Divider ratio | 1 to 60000 | ||||||||
| Output moving average | 1 to 99 | ||||||||
| Dynamic PredictiveTM | 8 levels (including continuous and stop prediction) | ||||||||
| Senond range | Two types of calculation rates can be set. *Switching to the second range for measurement is possible via control input function assignment. |
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| Control input | None or 1 point (depending on model) [D2] Option adds 2 points | ||||||||
| Settings | Set functions per control input (CTL) for external control [Functions] Hold (current value, max value, min value, max fluctuation range), zero shift, span shift, second range [ON Logic] Normally open, normally closed |
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| Operation Method | Control Input (CTL*) Terminal (ON Logic): Short to GND (Open) for ON, Open (Short) for setting content to take effect |
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| Data commnication | Command control possible via communication (USB, CAN, RS-485) *Commands set via communication cannot be canceled by terminal input. Reset execution is always required |
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| Response Time | Configurable from 1ms to 1999ms | ||||||||
| Display | |||||||||
| Indicator (Numerical Display) |
6-digit, 7-segment LED Character height 14.2mm [Standard] TQ-4801 Red LED / [Option] TQ-4801-G Green LED Display range:-199999 to 999999 Polarity indication: Reverse rotation -Lighted Over indication: OL / Zero indication: Leading zero suppress |
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| Decimal point position | Semi-fixed, set in program mode. [0] ******, [1] *****.* to [4] **.**** | ||||||||
| Update time | 0.3 sec (settable from 0.1 to 9.9 sec) | ||||||||
| Display accuracy | 20ppm ±1digit | ||||||||
| Indicator 4 round LEDs |
[IN] Illuminates during input operation [RUN] Illuminates when function setting is ON [COMP1][COMP2] Illuminates when comparator output is ON [Option] |
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| USB communication | |||||||||
| Specification | USB2.0 (Serial port communication by USB virtual COM 230.4kbps) | ||||||||
| Function | Writing/reading of set values/continuous output of measured values | ||||||||
| Output update | 1 to 9999.9ms, settable in 0.1ms increments (No output when output update time is set to 1 to 9) |
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| General Information | |||||||||
| Operating temp./humidity | -10°C to +50°C / 35 to 85%RH (non-condensing) | ||||||||
| Power supply [Select a model] |
[AF] AC100-240V (Maximum rated AC85-264V) 50/60Hz [DF] 9.6-30V DC with reverse connection protection |
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| Power consumption | 3W or less | ||||||||
| Isolation | [General-purpose input type]: Power supply / Other input/output [Line driver input type]: Power supply / Frequency signal input / Other input/output |
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| Withstand voltage | Between each terminal of the above isolation: DC 500V for 1 minute |
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| Weight | Approx. 340g | ||||||||
| CAN Option | |||||||||
| Specifications | CAN2.0B 10 k / 20 k / 50 k / 100 k / 250 k / 500 k / 1M bps [Format] INTEL/MOTOROLA, [Frame] 11bit/29bit |
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| Function | Writing/reading of set values/continuous output of measured values | ||||||||
| Setting item | CAN transmit ID, CAN receive ID | ||||||||
| Output update time | 1 to 9999.9ms Settable in 0.1 ms increments | ||||||||
| RS-485 communication option Modbus RTU support is available upon request. | |||||||||
| Connected units | 32 units [max.] | ||||||||
| Format | 2-wire multi-drop serial communication | ||||||||
| Method | Asynchronous | ||||||||
| Standard | RS-485 | ||||||||
| Speed | 9600bps / 19200bps / 38400bps Set in program mode | ||||||||
| Data format | Start bit: 1 bit / Stop bit: 1 bit / Data length: 8 bits / Parity bit: None | ||||||||
| Communication code | ASCII | ||||||||
| Function | Writing/reading set values/measurement value output [response to request command] | ||||||||
| Analog output option | |||||||||
| Output signals | [E1] 0 - 10V [E5] 0 - 5V [R1] ±10V [R5] ±5V [I1] 4 - 20mA [Select a model] | ||||||||
| D/A conversion method | DAC conversion method | ||||||||
| Output resolution | 16bit [50,000 or more] | ||||||||
| Load resistance | [Voltage output] 4.7kΩ or more / [Current output] 300Ω or less | ||||||||
| Output accuracy | [Voltage output] ±0.1% of FS @ 23℃/ [Current output] ±0.1% of FS @ 23℃ | ||||||||
| Temperature fluctuation | ±200ppm/℃ or less | ||||||||
| Output scaling | Arbitrary scaling is possible by full scale and zero scale settings | ||||||||
| Output update time | 0.1 to 9999.9ms settable in 0.1ms increments | ||||||||
| Input/output delay time | Output update time + analog rise time 150 μs max. | ||||||||
| Alarm [Comparator] output option | |||||||||
| Setting method | Set in program mode | ||||||||
| Number of outputs | 2 points (or 1 point) depends on the models 1 point for line driver input and analog output with comparator output specification. | ||||||||
| Output form | Isolated non-contact output [photo-MOS relay] No polarity. When comparator operating condition is ON, resistance between COMP and COM 50 Ω or less for C2 option [2 comparator] / 100 Ω or less for C1 option [1 comparator] |
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| Output load voltage | Peak AC/DC280V 100mA [resistive load] / ON resistance 50Ω or less | ||||||||
| Output logic | Comparison is made with polarity [0 is greater than minus]
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| Update time | Depends on analog output update time setting. Response time 1ms [max.] | ||||||||
| Ethernet Communication Option | |||||||||
| Connector | RJ-45 (Network Interface) Lantronix XPort | ||||||||
| Interface | 100BASE-TX/10BASE-T(Auto-sensing) Transmission Speed Standard: Category 5/Category 4 |
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| Specifications | Protocol: TCP/IP Method: Telnet Communication Connection | ||||||||
| Output update | Same as USB communication 1 - 9999ms | ||||||||
| Transmission Compatibility | DIX Ethernet Version2.0 IEEE 802.3 | ||||||||
| LED Indicators | 100BASE-TX/10BASE-T | ||||||||
| Link/Activity Indicator | Full Duplex/Half Duplex (Telnet cannot handle encrypted communication networks using SSL/TLS or SSH) | ||||||||
| Load Cell/Pressure/Strain | CAN Conversion |
| DC Current | DC Voltage |
| Thermocouple (Temp) | Thermistor (Temp) |
| RTD (Temp) | Resistance |
| Speed / Totalizing | Freq. Deviation / Torque |
- CAN & 16-bit Analog (Voltage/Current) Output
- USB-C: Setup and Data Logging
- Alarm Output / RS-485
- Dedicated Free Software: Settings Management, Report Printing, and Data Logging