K22753 LKV3000/LKV4000 Digital Refrigerated Constant Temperature Kinematic Viscosity Baths


Test Method
Kinematic viscosity is of primary importance in the design and selection of a wide range of petroleum products. Calibrated capillary viscometers are used to measure flow under gravity or vacuum at precisely controlled temperatures.

Features and Benefits
• Improved design with enhanced performance and safety features

• Standard -30C (-22F) LKV3000 model, and extended range -70C (-94F) LKV4000 model

• Microprocessor PID temperature control with two decimal calibration offset

• Dual digital displays show setpoint and actual bath temperature

• Selectable temperature scale - Fahrenheit or Celsius

• Conforms to ASTM D445, D6074 and related specifications for kinematic viscosity testing


LKV3000/LKV4000 Refrigerated Constant Temperature Baths
New refrigerated constant temperature bath series with improvements in operating features, safety and cabinetry. Advanced temperature control circuitry includes microprocessor PID design and two decimal calibration offset. Simple push-button controls and dual digital displays permit easy setting and monitoring of bath temperature. Baths accommodate four glass capillary viscometers using 2" (51mm) round holders (rectangular ports are available on special order). Bath medium is contained in a clear, evacuated Dewar flask, and glare-free fluorescent backlighting provides excellent visibility when working with the viscometers.

Standard and Extended Range Models — Standard LKV3000 model operates at temperatures from ambient to -30C (-22F). Extended range LKV4000 model operates at temperatures as low as -70C (-94F). Both models exceed ASTM temperature control accuracy and uniformity requirements throughout the operating range. Air-cooled hermetic compressors provide efficient operation with the use of CFC free refrigerants. Communications software (RS232, etc.) ramp-to-set, and other enhanced features are available at additional cost.

Bath Construction and Safety Features — Insulated steel cabinet has an attractive polyester-epoxy finish and is mounted on adjustable leveling feet. Chemical resistant working (top) surface has four round ports for 2" (51mm) viscometer holders and one port for a thermometer holder. Front viewing window provides clear, distortion-free visibility. Microprocessor controller incorporates circuitry that interrupts power to the heater in the event of an over-temperature condition or disconnection of the primary probe. A redundant adjustable controller and sensor probe provide added over-temperature protection, and an integrated low liquid level sensor removes power to the heaters if the bath liquid is not filled to the proper level or falls below during operation. Both over-temperature and low liquid level circuits will latch and prevent further operation of the bath until the fault is removed.

Conforms to the specifications of: ASTM D445, D2532, D6074, D6158; IP 71; ISO 3104; DIN 51550; FTM 791-305

Testing Capacity: Four (4) glass capillary viscometers

Viscometer Ports: Four (4) round 2" (51 mm) ports

Bath Dimensions: 9.5" dia x 12" deep (24x30cm)

Bath Capacity: 3.7 gal (14 L)

Temperature Control:
Display: 0.1C/F resolution, calaibrate to 0.01C/0.01F
Control accuracy and uniformity: Exceeds ASTM requirements throughout the operating range

Included Accessories
Four (4) plastic viscometer port covers with handles
Thermometer holder

Dimensions lxwxh,in.(cm)
42x35x36 (107x89x91)
Net Weight:
176 lbs (80 kg)

Shipping Information

Shipping Weight: 300 lbs (136kg)
Dimensions: 42 Cu. ft.

Ordering Information




Electrical Requirements

Temperature Range



115V, 60Hz
Single Phase, 20.1A

15 to -30C
59 to -22F



220-240V, 50Hz
Single Phase, 10.6A

15 to -30C
59 to -22F



115V, 60Hz
Single Phase, 26.9A

15 to -70C
59 to -94F



220-240V, 50Hz
Single Phase, 14.5A

15 to -70C
59 to -94F