The instrument's structure primarily comprises a torsion wire, sensor, platinum ring, and lifting component. During operation, the platinum ring is immersed in a specific position of the liquid under test. A motor, belt, and tray drive the glassware containing the liquid to descend, stretching the film between the platinum ring and the liquid. This stretching subjects the platinum ring to a downward force, causing the torsion wire to twist via a lever arm. The sensor measures the displacement at the lever arm's opposite end, converting the film's deformation into a voltage. After circuit processing, this voltage is transformed into the corresponding tension value, which is automatically displayed. As the film stretches gradually, the tension value increases until the film breaks. The maximum value is recorded as the measured tension value $P$ of the liquid. Multiplying $P$ by the liquid's correction factor $F$ yields the actual tension value $V$ , i.e., $V = P \cdot F$ . The correction factor $F$ depends on the measured tension value $P$ , liquid density, platinum wire radius, and platinum ring radius.

For example:

After zero adjustment, place a 500mg weight on the paper. The displayed value should be 40.8±0.1. If not, adjust the potentiometer to reach this value before conducting liquid tension tests. Normally, no adjustment is needed if the tension value is within the allowable error range. Calibration is required when using the instrument for the first time, after long-term storage, or when significant test result errors are suspected.

Technical data:

Model: JZYW-200C
Measuring Range: 0–199.9 mN/m
Minimum Resolution: 0.01 mN/m
Platinum Ring Radius: R9.55 mm
Platinum Wire Radius: r0.3 mm
Power Supply: 220V 50Hz
Relative Error: Within ±1%
Dimensions & Weight: 200×260×300 mm, 10 kg
Temperature Requirement: (20±5)°C

Performance:

Tension displayed on LCD
Peak value hold function
Automatic average calculation
Automated test bed movement with auto-stop

Standard:

JB/T9388 ISO/1409

Applicability:

Physical methods are employed to measure liquid tension. This type of tensiometer finds extensive use in scientific research institutions, universities, and water & power sectors.

Configuration:

Name	Quantity
Main frame	1
Platinum Circle	1
beaker	1
hook	1
torsion wire	1
Calibration weight(500mg)	1

Parameter:

Model	ZL-E1	ZL-E2
Test method	Design platinum plate and platinum ring at the same time, can choose one of them, can also choose two at the same time
Control mode	Manual lifting
Display mode	LED digital tube display
Measuring time	Platinum plate method ≤10s. Platinum ring method ≤50 s
Sample size required	Platinum plate method ≥3mL; Platinum ring method ≥5mL
Test range (mN/m)	0-1000	0-1000
Resolution ratio(mN/m)	0.1	0.01
Accuracy(mN/m)	0.1	0.01
Repeatability(mN/m)	0.1	0.01
Precision of Electronic balance	Domestic 1/1000 grams	Domestic 1/10000 grams
Weighing system type	Electromagnetic force balance
Accuracy automatic calibration	Accuracy automatic calibration: provide weight correction, distilled water and ethanol coefficient correction, temperature correction
Data acquisition software	Standard: the configuration software can operate, store, export Excel data and print by computer
The micro printer interface	Optional
Thermostatic temperature control interface	Optional: it can test the value of surface tension at a specific temperature
Equipment weight and size	20cm35cm35cm,7.5kg；
Power	100W