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

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

Answer: Official manufacturer technical specifications from Lichen Scientific include:

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

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

• Display: 3.5-inch high-resolution LCD display with bilingual Chinese/English interface.

• 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).

• Temperature Probe & Accuracy: Integrated real-time RTD temperature sensor interface with +/- 0.2 degrees C accuracy.

• Timer Function: Standard built-in timer supporting timed and untimed continuous measurement modes.

• Data Interface: Optional RS232 communications port for computer connection or printer output.

• Power Supply & Motor: AC 220V +/-10%, 50Hz +/-10%; 5W motor power.

• 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 testing range, display type, precision rating, and inclusion of temperature monitoring probes. Professional digital models with temperature sensors like the Lichen LC-NDJ-S typically range between BDT 55,000 and BDT 1,00,000 as a complete set. For exact updated price quotes, stock availability, and institutional procurement in BD, please contact Federal Scientific Mart (fsm.com.bd).

Q3: What are the main design improvements in the "Pro" series (LC-NDJ-8S Pro) compared to the standard LC-NDJ-8S?

Answer: While both models offer an identical wide testing range of up to 2,000,000 mPa.s across 8 rotational speeds, the LC-NDJ-8S Pro adds key professional features:

• Temperature Detection: The LC-NDJ-8S Pro includes a real-time sample temperature probe interface with high accuracy (+/- 0.2 degrees C), whereas the standard NDJ-8S does not include integrated temperature tracking.

• Enhanced Stability & Smooth Lifting: Features a helical rack and pinion vertical lifting system and an internal synchronized damping system to minimize motor vibration during lower speed runs.

• Improved Alignment: Integrates a universal joint connection interface at the rotor shaft to ensure correct alignment and reduce mechanical stress during spinning.

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

Answer: The LC-NDJ-8S Pro drives a standard rotor (No. 1 to 4) at a pre-selected constant rotational speed (0.3 to 60 rpm) through a 5W microcomputer-controlled stepping motor. As the spindle rotates in the fluid sample, viscous drag resistance acts against the rotor. The internal sensor detects this torque resistance, and the microprocessor automatically computes and displays dynamic viscosity in mPa.s or cP alongside sample temperature and percentage scale on the LCD screen.

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

Answer: The LC-NDJ-8S Pro measures both low-viscosity and high-viscosity liquids across diverse industrial QA/QC and R&D testing environments:

• Paints, Coatings & Inks: Testing shear viscosity, flowability, and consistency.

• Adhesives, Resins & Polymers: Checking curing status and dynamic viscous resistance.

• Petrochemicals, Oils & Greases: Lubricating oil grade verification and thermal viscosity tracking.

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

• Food & Beverage Processing: Evaluating starch pastes, dairy products, sauces, and edible oils.

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

Answer:

1. Level the instrument on a stable benchtop using the built-in spirit level bubble and adjustable leveling feet.

2. Connect the temperature sensor probe to the rear interface and insert it into the sample container.

3. Select the appropriate rotor (No. 1 for lower viscosity; No. 4 for higher viscosity) and attach it to the universal joint interface using left-hand thread rotation.

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

5. Select the rotor number and desired rotational speed (rpm) on the 3.5-inch LCD menu.

6. Press START; the motor rotates and displays stable viscosity (mPa.s), temperature, and torque percentage within seconds.

Q7: What is the purpose of the optional No. 0 rotor?

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

Q8: What routine maintenance ensures long-term accuracy of the viscometer?

Answer:

• Spindle Care: Always unscrew rotors gently by lifting the connection screw slightly to protect the internal pivot point and jewel bearing.

• Cleaning: Wash rotors immediately after testing using appropriate non-corrosive solvents, and dry thoroughly.

• Leveling Check: Re-check the spirit level bubble before each batch of 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: Authorize supplier of Lichen Scientific (Zhejiang Lichen Instrument Technology Co., Ltd.) manufactured laboratory equipment in Bangladesh.

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

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