Digital Tuning Fork Density Meter for Oil

Factory price digital tuning fork density meter is mainly composed of a transmitter, a vibrating fork body and a temperature measuring element, which can be used for measuring the density oil.

Specification

• Model: ATO-APX301-OIL
• Measuring Medium: Oil
• Measuring Range: 0 – 2.5 g/cc (0 – 2500 kg/m³), 0~100.0%
• Calibration Range: 0 – 2.5 g/cc (0 – 2500 kg/m³), 0~100.0%
• Measurement Accuracy: ± 0.002 g/cc (± 2 kg/m³), ±0.5%
• Repeatability: ± 0.001 g/cc (± 0.2 kg/m³) ±0.1%
• Medium Temperature Range: -50℃ ~ +150℃
• Working Pressure (Optional): 0.2~0.3MPa, Max. Pressure ≤4MPa
• Fluid Viscosity Range: 0 – 600Cp
• Media Temperature (Optional): 0~100℃, 0~150℃
• Temperature Coefficient: ＜0.1 kg/m³/℃ (± 0.5%) After Correction
• Stress Effect: Negligible
• Built-in Temperature Sensor: Digital Sensor
• Wetted Material (Optional): 316 Stainless Steel, 316 Stainless Steel + PTFE, 316 Stainless Steel +PFA, 2205 Stainless Steel, Hastelloy Alloy C276, Titanium Alloy
• Electrical Connection (Optional): M20*1.5, G1/2, NPT1/2
• Connection Type (Optional): G1/2” Thread, DN50 Flanged, DN80 Flanged, 1/2” Trip Clamp, 2” Trip Clamp
• Fork Body Coating: Standard PTFE or PFA
• Power Supply: 24VDC, ≥50mA
• Analog Signal Output: 4-20mA, 0-1000Hz, RS485 Modbus, 4 Wires
• Output Accuracy (20℃): ± 0.1% of reading or ± 0.05% FS
• Output repeatability (-40~+85℃): ± 0.05% FS
• Protection Level: IP65
• Shell: Aluminum Alloy

Dimensions (Unit: mm)

Wiring diagram

Tips: Tuning fork density meter working principle

The tuning fork density meter is an integrated structure, which is mainly composed of a transmitter, a vibrating fork body and a temperature measuring element. The tuning fork body vibrates at the natural frequency driven by the piezoelectric crystal, and the vibration frequency is detected by the piezoelectric crystal located at the end of the other fork body. When the liquid flows through the fork body, the natural vibration frequency of the fork body will change with the change of the surrounding liquid density, and the vibration period (reciprocal frequency) of the fork body has a specific functional relationship with the liquid density. By detecting the change of the vibration frequency, the density of the current liquid can be calculated.

The mechanical properties and elasticity of the metal fork body change with temperature, which will cause the vibration frequency of the mechanical parts of the tuning fork to change. The temperature detection element integrated on the fork body compensates for the influence of temperature changes.