Kinematic Viscosity Bath DKV-256

DKV256 (256A) Kinematic Viscosity bath conforms the ASTM D445 StandardTest Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity). It is used to test the of liquid petroleum products, both transparent and opaque, by measuring the time for a volume of liquid to flow under gravity through a calibrated glass capillary viscometer. The dynamic viscosity, η, can be obtained by multiplying the kinematic viscosity, ν, by the density, ρ, of the liquid. under certain constant temperature. The range of kinematic viscosities covered by this apparatus method is from 0.2 to 300 000 mm2/s at all temperatures

DKV-256: temperature controlling precision,±0.1

DKV-256A: temperature controlling precision,±0.01

ُpecification :

Features

1.The apparatus is equipped with 4 advanced viscometer holders, easy to operate.

2.The apparatus adopts digital display temperature control with high temperature controlling precision.

3.The apparatus is equipped with heat preservation bath.

4.The rotational constant bath must be provided when the temperature is 20 °C.

5.Rational design with elegant structure and easy operation.

Technical parameters

1.Rated voltage：AC220V±10% 50Hz

2.Temperature control range：20~100°C

3.Temperature control mode：Digital display temperature control

4.Precision of temperature control：±0.1°C（±0.01°C）

5.Output power：1800W

6.Ambient requirements：Temperature: 10~40°C；Humidity≤85%

Precision Temperature Control for Viscosity Testing with the Kinematic Viscosity Bath DKV-256

Ensure accurate and repeatable kinematic viscosity measurements with the Kinematic Viscosity Bath DKV-256—a high-stability, thermostatically controlled bath engineered for use with glass capillary viscometers in compliance with ASTM D445, ISO 3104, IP 71, and GB/T 265 standards. Designed for petroleum, lubricant, and chemical laboratories, the DKV-256 provides uniform temperature conditions at critical test points (typically 20°C, 40°C, 50°C, 80°C, and 100°C) to support reliable viscosity indexing and fluid characterization.

Engineered for Stability, Uniformity, and Reliability

The DKV-256 Kinematic Viscosity Bath features a large-capacity, transparent tank with a precision PID temperature control system and a high-flow circulating pump that maintains bath uniformity within ±0.01°C. Its robust construction accommodates multiple Ubbelohde or Cannon-Fenske viscometers simultaneously, while the illuminated background and magnifying window enhance meniscus visibility for manual or semi-automated timing.

Exceptional Temperature Stability: ±0.01°C – Meets stringent requirements for ASTM/ISO viscosity testing.
Wide Operating Range: Ambient to 120°C – Covers all standard test temperatures for oils and fuels.
High-Flow Circulation System – Ensures uniform temperature throughout the bath volume.
Transparent Acrylic Tank with LED Backlight – Improves sample visibility and reduces operator eye strain.
Adjustable Viscometer Holder Rack – Securely positions multiple capillaries for parallel testing.
Digital Display & Over-Temperature Protection – Clear readout with safety cutoff for unattended operation.

Trusted for High-Integrity Viscosity Analysis

Kinematic viscosity is fundamental to lubricant grading (e.g., SAE, ISO VG), fuel performance, and quality control. The DKV-256 serves as the core platform for both manual and automated viscosity workflows—ideal for QC labs, R&D facilities, and educational institutions. Its reliability and thermal precision make it compatible with both entry-level timing setups and advanced optical detection systems.

Whether you’re certifying engine oil batches or teaching fluid dynamics, the Kinematic Viscosity Bath DKV-256 delivers the thermal stability and operational clarity your viscosity measurements demand.

Stable. Precise. Built for accuracy—down to the last centistoke.