How is the ethanol concentration of blended fuels measured?

By combining a frequency output type flex-fuel sensor with Coco Research's TQ series frequency deviation meters. The meter calculates the deviation (Hz) from the sensor's center frequency as an ethanol concentration percentage (%), displays it digitally, and can simultaneously output it as high-speed analog signals or CAN data.

Is the concentration measurement response fast enough for transient engine operations?

The TQ series features a 16-bit analog output with an update rate of up to 0.1 ms, allowing it to track rapid changes in fuel composition with extremely high responsiveness. Furthermore, the simultaneous 1 ms update CAN output fully supports high-speed data logging environments such as ECU development.

Can I measure fuel consumption (flow rate) at the same time as concentration?

Yes, by utilizing positive displacement flow sensors (XFS/VC series) along with the SPD series speedometers, you can measure instantaneous flow rate and totalized flow volume simultaneously.

Is there a way to build a concentration monitoring system cost-effectively?

We highly recommend the low-cost model TQL-2401. It retains the same calculation features as the higher-end models but reduces costs by setting the output update time to 40 ms. This provides a very reasonable solution for applications that do not require extremely fast responses, such as fixed-point monitoring on production lines.

Ethanol Concentration Measurement & Flow Rate Evaluation for Biofuels / Blended Fuels

Product Introduction

Ethanol Concentration Measurement
	Frequency Deviation Meter 48x96 Size TQ-4801 Product Page	USB RS-485 Modbus CAN Analog Output Alarm Output	■ Frequency deviation meter compatible with frequency output type flex-fuel sensors ■ Center frequency and deviation frequency (concentration frequency) can be set arbitrarily ■ Simultaneous output of 16-bit analog output (0.1 ms) and CAN output (1 ms) is possible (TQL updates at 40 ms) ■ Logging and configuration available via USB ■ Supports LINKSHIP (Coco Research's free measurement management software) ■ TQ-4801 / TQ(L)-2401: Panel-mount type with display ■ TQ(L)-2451: DIN rail-mount type without display ■ TQ(L)-2431: DIN rail-mount type with display
	Frequency Deviation Meter 24x48 Size TQ-2401 Product Page Low-cost Model TQL-2401 Product Page	USB RS-485 Modbus CAN Analog Output Alarm Output
Flow Measurement
	Positive Displacement Flow Sensor XFS Series Product Page		■ Low pressure loss due to special elliptical gears ■ High-precision measurement from micro-flow to large-flow ranges
	Positive Displacement Flow Sensor VC Series Product Page		■ Manufactured by KRACHT ■ High precision, high resolution, wide flow range, wide temperature range, and high pressure resistance ■ High-precision measurement from micro-flow to large-flow ranges
	Universal Speedometer TDP-4921 / TDP-4931 Product Page		■ For flowmeters, frequency meters, tachometers, speedometers, etc. ■ Reversible measurement supported
	Speedometer / Totalizer [Switchable] SPD-2401 Product Page SPDL-2401 (Low-cost Model) Product Page		■ For flowmeters, frequency meters, tachometers, speedometers, etc. ■ Measurement can be switched between instantaneous flow rate (flow velocity) and flow volume (totalized flow) via settings ■ Simultaneous output of 16-bit analog output (0.1 ms) and CAN output (1 ms) is possible (SPDL updates at 40 ms) ■ Logging and configuration available via USB ■ Supports LINKSHIP (Coco Research's free measurement management software)
Enclosure Type / Customized Products
	Enclosure Type [Customized Products] Product Page		■ Multiple measurement types (current, voltage, temperature, etc.) and multiple channels can be integrated into a single unit. [Current] [Voltage] [Resistance] [Thermocouple] [Thermistor] [Speed] [Angle] [Position] [Flow Rate] [Torque], etc. ■ Outputs can also be combined. [CAN] [RS-485] [Ethernet] [16-bit Analog] [HDMI Output] [Alarm Output], etc. ■ Simultaneous output of 16-bit analog output and CAN is possible. ■ Compact: Easy for outdoor measurement, transport, and storage. ■ Supports LINKSHIP (Coco Research's free measurement management software)

Fuel Blend Measurement for Biofuels, etc.