1-2×10^6 mPa·s Rotational Viscometer, NDJ-8S | Lichen Scientific

Q1: What are the official technical specifications of the Lichen LC-NDJ-8S Viscometer?

Answer: Official manufacturer technical specifications from Lichen Scientific include:

• Model: LC-NDJ-8S (Digital Rotational Viscometer).

• Measurement Range: 1 to 2 x 10^6 mPa.s (1 to 2,000,000 mPa.s / cP).

• Display: Blue backlight LCD display with multi-parameter readout (Viscosity, Rotor Number, Speed, Torque Percentage).

• Spindle Speeds (rpm): 0.3, 0.6, 1.5, 3, 6, 12, 30, and 60 rpm (8 discrete speed settings).

• Spindle Specifications: Standard set of No. 1, 2, 3, and 4 rotors (Optional: No. 0 rotor for ultra-low viscosity samples).

• Measurement Accuracy: +/- 2.0% (Newtonian Fluid).

• Repeatability Error: +/- 1.0% (Newtonian Fluid).

• Interface & Processing: Microcomputer-controlled drive with auto-range calculation and high-subdivision stepping motor.

• Power Supply: AC 220V +/-10%, 50Hz +/-10%.

• Dimensions & Weight: 276 x 270 x 500 mm (maximum lifting height); Net Weight: 4.0 kg.

Q2: What is the price of a digital rotational viscometer in Bangladesh (BD)?

Answer: Digital rotational viscometers in Bangladesh generally range from BDT 45,000 to BDT 1,20,000+, depending on viscosity measurement limits, motor stability, display type, and sensor accessories. Standard digital models like the Lichen LC-NDJ-8S typically range between BDT 75,000 and BDT 90,000 as a complete set. For exact updated price quotes, direct stock availability, and institutional procurement in BD, please contact Federal Scientific Mart (fsm.com.bd).

Q3: What is the main difference between the Lichen LC-NDJ-8S and LC-NDJ-8S Pro models?

Answer: While both models share the same measurement range (1 to 2,000,000 mPa.s) and 8-speed rotational drive, the LC-NDJ-8S Pro includes several major hardware and hardware interface upgrades:

• Real-time Temperature Sensor: The LC-NDJ-8S Pro features an integrated RTD sample temperature probe interface (+/- 0.2 degrees C accuracy) to monitor liquid sample temperature live on screen during testing. The standard LC-NDJ-8S lacks a built-in temperature sensor interface.

• Lifting & Structural Drive: The Pro model utilizes an upgraded helical rack and pinion lifting system along with a universal joint rotor attachment to minimize motor vibration and ensure perfect axial shaft alignment. The standard LC-NDJ-8S uses a traditional straight-rack lifting rack and direct rotor threading.

• Display & Interface: The Pro version incorporates an upgraded 3.5-inch high-resolution LCD display with bilingual menu navigation, whereas the standard LC-NDJ-8S features a standard blue backlight digital screen.

Q4: How does the rotational measurement mechanism work on the LC-NDJ-8S?

Answer: The LC-NDJ-8S drives a pre-selected rotor (No. 1 to 4) at a constant speed (0.3 to 60 rpm) through an internal microcomputer-controlled stepping motor. As the spindle rotates in the fluid sample, viscous drag resistance acts against the rotor shaft. The internal sensor detects this torque resistance, and the microprocessor automatically calculates and displays the dynamic viscosity in mPa.s (or cP) on the digital LCD screen.

Q5: What primary industrial applications and fluids are tested with the LC-NDJ-8S?

Answer: The LC-NDJ-8S measures both low-viscosity and high-viscosity liquids across diverse quality control and production environments:

• Paints, Coatings & Inks: Evaluating flowability, brushability, and storage stability.

• Adhesives, Resins & Polymers: Monitoring batch consistency and cross-linking viscosity changes.

• Petrochemicals & Lubricants: Testing engine oils, gear oils, and liquid greases.

• Pharmaceuticals & Cosmetics: Checking lotions, syrups, creams, gels, and shampoos.

• Food & Beverage Processing: Evaluating syrups, starch pastes, sauces, and dairy items.

Q6: How do you operate and set up the LC-NDJ-8S viscometer step-by-step?

Answer:

1. Position the viscometer on a level benchtop and adjust the leveling feet until the spirit bubble is centered.

2. Select the correct rotor (No. 1 for lower viscosity; No. 4 for higher viscosity) and attach it carefully to the connecting screw using left-hand thread rotation.

3. Lower the spindle into the sample fluid until the fluid surface aligns precisely with the rotor immersion mark.

4. Select the rotor number and desired rotational speed (rpm) on the front control panel.

5. Press the START button; the motor rotates and displays stable dynamic viscosity (mPa.s) and torque percentage within seconds.

Q7: When should you use the optional No. 0 rotor (UL Adapter)?

Answer: The standard rotor set (No. 1, 2, 3, and 4) is designed for general fluids with viscosity above 10 mPa.s. For ultra-low viscosity liquids (such as water, light solvents, thin juices, or gasoline) ranging between 1 mPa.s and 10 mPa.s, the optional No. 0 rotor (UL Adapter) is required to provide sufficient surface area and torque sensitivity for precise readings.

Q8: What maintenance steps ensure long-term accuracy of the viscometer?

Answer:

• Careful Rotor Handling: Always hold the upper connection shaft firmly when attaching or removing rotors to protect the delicate internal pivot point and jewel bearing.

• Cleaning: Immediately clean all rotors after testing using mild, non-corrosive solvents, and dry thoroughly before storage.

• Leveling Check: Re-check the spirit level bubble before taking measurements to avoid tilt errors.

Q9: Why purchase Lichen Scientific equipment from Federal Scientific Mart (fsm.com.bd)?

Answer: Purchasing through Federal Scientific Mart guarantees:

• Authorized Supplier: Direct supply of genuine Lichen (Zhejiang Lichen Instrument Technology Co., Ltd.) laboratory equipment in factory packaging.

• Local Service & Warranty: Direct manufacturer warranty coverage, local technical calibration support, spare rotors, and official technician assistance across Bangladesh.

• Nationwide Fast Delivery: Safe and secure shipping to Dhaka, Chittagong, Rajshahi, Khulna, Sylhet, Barisal, Rangpur, and all districts in BD.