Conditional verdict: Consider the USS-DVT6 when a benchtop rotor-torque-to-viscosity method fits your liquid and you can document rotor, speed, duration, temperature and sample geometry. The documented temperature measurement is not temperature control, and the viscosity value is not independent of test conditions.[1][2] Skip it if verified electronic records, a continuous speed program or validated uncertainty for your exact material are required. The selected ordinary offer is B00W4U8IEE, whose technical details identify USS-DVT6.[3]
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What the instrument actually measures
The motor drives the selected rotor through the liquid at a chosen speed. Sensors detect the resulting torque and the microcomputer calculates a viscosity value.[2] The manual describes displays for rotor type, speed, viscosity and percentage of the full-scale range.[2] This is a torque-derived result under a particular setup, not a material constant independent of the measurement conditions.
Percent full scale is a derived display value, not an independent second viscosity measurement.[2] Interpret it with the selected rotor, speed and method; this review does not establish an optimal torque-percentage window or achieved uncertainty.
Rotor and speed choices define the method
The selected DVT6 is documented with standard rotors 1–4 and four speeds: 6, 12, 30 and 60 rpm, plus Auto.[1][2] The manual explicitly says TIMING does not work in Auto mode.[2] Do not transfer the 0.3, 0.6, 1.5 and 3 rpm settings from the DVT1/DVT8 columns to this configuration.[2]
The range table relates spindle and speed to the listed range values; it does not establish continuous lower-to-upper performance bands for every liquid. Rotor 4 at 6 rpm has the 100,000 mPa·s entry.[2] The manual names a separately optional No. 0 rotor for low-viscosity work and states a nominal 0.1 mPa·s capability for it.[2] That accessory capability is not an included-rotor-set guarantee.
The maker’s selected specification and manual use a 1–100,000 mPa·s headline, while the maker and retail model-comparison tables give DVT6 as 10–100,000 mPa·s.[1][2][3] The manual separately directs liquids below 11 mPa·s to the No. 0 rotor.[2] Resolve the configuration and method before a low-viscosity purchase rather than treating the smallest headline number as standard-kit coverage.
Newtonian and non-Newtonian results are not interchangeable
The published ±2% statement is limited to Newtonian liquids.[1][2] Neither a reading-versus-full-scale basis nor achieved uncertainty for your sample was established. Treat it as a published specification under an applicable method, not a hands-on test result or confirmation that more displayed digits mean smaller error.
The manual explains that apparent viscosity of non-Newtonian liquids varies with shear rate and time, and calls for rotor, speed and duration to be specified.[2] Differences under different settings are not automatically instrument faults. Temperature, container and relevant sample condition also belong in the comparison context.[2]
This makes the DVT6 a conditional fit for comparative process checks, incoming-material screening, or a defined bench method. It is a poor fit if your purchasing requirement assumes that one number will remain material-invariant across speeds, temperatures, bubbles, or geometries.
Temperature is displayed, not thermostatically controlled
DVT6’s documented temperature device displays temperature; it is not a thermostat, bath, heater or cooler.[1][2] The manual treats liquid-temperature control and rotor/sample temperature consistency as separate method requirements.[2] A temperature display therefore adds context, not demonstrated thermal control.
The manual describes a stable, clean, dry, level, vibration-free work area and specifies a container at least 70 mm in diameter and 125 mm high.[2] It identifies sample uniformity, bubbles, centering, the protection frame and cleanliness as measurement considerations.[2] Assess that method burden without treating this buyer guide as an assembly, chemical-cleaning or sample-preparation procedure.
What is included and what is not established
The manual’s standard packing list includes the main machine, rotors 1–4, power adapter, protection frame, base, lifting shaft, two wrenches and machine-head handwheel; No. 0 is under Options.[2] The current maker page identifies SKU JFDVT00006 and gives a shorter package list.[1] These are documented contents, not an inspection of the selected seller’s carton.
The maker’s DVT6 comparison marks RS232 absent, and the manual’s parameter column is blank while its shared rear diagram labels the interface optional.[1][2] The selected DVT6 column of the retail comparison also marks RS232 absent.[3] Do not borrow the DVT5 or DVT8 connection features, or expect supplied PC software, printing or automatic records.
The selected maker specification states AC 110 V, while its introductory copy and the retail feature claim 100–240 V.[1][3] The manual’s literal power line is “AC 110 V±10, 60 Hz±10%”; the voltage tolerance is not silently rewritten as ±10%.[2] Confirm the applicable supplied adapter and rating for the intended supply; neither universal-input operation nor a transformer solution is established.
Fit-or-skip decision
Consider this model for trained personnel comparing appropriate, known, nonhazardous reference liquids under a defined rotor-speed-time-temperature method. The manual calls for a stable bench away from magnetic interference and explosive hazards, with a 5–35°C working environment and ≤80% RH.[2] That narrower editorial review scope is not a manufacturer prohibition on every industrial liquid.
Skip it if your essential requirement is built-in sample-temperature control, a continuous lower-speed program, verified electronic records or validated uncertainty for your exact material. Do not turn a displayed viscosity into a medical, grade, regulatory or chemical-safety certification. The purchase depends on a compatible method and the exact supplied configuration, not a promise that it measures every liquid.
The buying decision
Shortlist USS-DVT6 for a defined rotary-viscometry comparison with the documented rotor and speed choices, temperature context and method limits. Skip it for hands-off automation, universal material claims, thermostatic control or assumed PC connectivity. Confirm the power and low-viscosity accessory configuration when either changes the purchase decision.[1][2][3]
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Sources
Based on the current selected USS-DVT6 maker page, its linked 19-physical-page Version 1.0 manual and the ordinary B00W4U8IEE offer.[1][2][3] The manual prose uses USS-DVT00006 and its parameter table USS-DVT6; those labels are preserved without assigning a shipment revision.[2] Printed content labels are generally one lower than physical indices.[2]