• KV4000 Kinematic Viscosity Bath with Integrated Digital Timing

KV4000 Kinematic Viscosity Bath with Integrated Digital Timing

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.

  • Microprocessor temperature control between ambient and 150 °C (302 °F)
  • Integrated digital timing for easy measurement of sample efflux times
  • Permits entry of viscometer constants for automatic calculation and display in viscosity units or seconds
  • Dual digital displays show setpoint and actual bath temperature
  • Selectable temperature scale - Fahrenheit or Celsius
  • Conforms to ASTM D445, D2170 and related specifications

Constant temperature bath with advanced temperature control circuitry and integrated timing features for convenient, accurate glass capillary viscometry determinations. Microprocessor PID circuitry assures precise, reliable temperature control within ASTM specified tolerances throughout the operating range of the bath. Simple push-button controls and dual digital displays permit easy setting and monitoring of bath temperature. Two place calibration offset capability is provided. The bath accommodates seven glass capillary viscometers of various types. Viewing the viscometers is made easy by glare-free LED illumination inside the bath and a baffle that provides a background for easy viewing. Temperature control uniformity is assured by means of motorized stirrer which provides complete circulation without turbulence. Connection of the built-in cooling coil to tap water or a recirculating water chiller facilitates temperature control at ambient or below-ambient temperatures. Communications software (RS232, etc.) ramp-to-set and other enhanced features are available at an additional cost.  

Integrated Timing Features -The user can enter the viscosity constant for each viscometer on the front Touch Screen Control Panel and then get the test result in both efflux time and viscosity units automatically after stopping each timer. Timing function is displayed in 0.01 second resolution and is accurate within 0.01%. 

Bath Construction and Safety Features - Bath chamber is a clear borosilicate glass vessel enclosed in a polyester-epoxy finished steel housing. The top working surface has seven 2" (51mm) viscometer ports. Front viewing window assures safe, distortion-free viewing. Microprocessor temperature controller incorporates safety circuitry that interrupts power to the heaters in the event of an overtemperature condition or disconnection of the primary probe. For added safety, an adjustable redundant controller with separate sensor probe interrupts power if an overtemperature situation occurs. An integrated low-liquid sensor prevents operation of the bath if the bath liquid is not filled to the proper level and cuts off power should it fall 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.
  • Port Cover, Delrin® (7)
  • Thermometer Holder

Conforms to the specifications of: ASTM D445, D2170, D6074, D6158; IP 71, 319; ISO 3104; DIN 51550; FTM 791-305; NF T 60-100

Temperature Control Range: ambient to 150°C (302°F); sub-ambient to 10°C with external cooling

Display: 0.1 °C / 0.1 °F resolution, calibrate to 0.01 °C / 0.01 °F

Control accuracy and uniformity: Exceeds ASTM requirements throughout the operating range

Timing: Integrated timing function within Touch Screen Control Panel displayed to 0.1 seconds and accurate within 0.01%

Communication: RS232, RS485 port

Viscometer ports: Seven round 2" (51mm) ports

Bath Medium: Water or suitable heat transfer fluid                                                                                                

Bath Capacity:

12": 5.8 gal (22L)
18": 8.9 gal (33.7L)

115V 60Hz, Single Phase, 12.6A
220-240V 50/60Hz, Single Phase, 7.2A


12" Bath: 20 ¼ x 15 ¼ x 24 ½ (51x39x62)

18" Bath: 20 ¼ x 15 ¼ x 30 ½ (51x39x77)

Net Weight:

12" Bath Net Weight: 78 lbs (35.5kg)
18" Bath Net Weight: 90 lbs (41kg)

Shipping Weight

12" Bath Depth: 95 lbs  (43.1 kg)  
18" Bath Depth: 100 lbs  (45.4 kg)  

12" Bath Depth: 28x24x33 in. (71.12x60.96x83.82 cm) 
18" Bath Depth: 28x24x33 in. (71.12x60.96x83.82 cm)

  • 378-025-C01 thru 378-700-C01 Cannon®-Fenske Viscometer Tubes, Size 25 thru 700 
  • 378-025-C02 thru 378-700-C02 Cannon®-Fenske Opaque Reverse Flow Viscometer Tubes, Size 25 thru 700
  • 378-000-C03 thru 378-005-C03 Ubbelohde Viscometer Tubes, Size 0 thru 5 
  • K23700-SFW-A Kinematic Viscosity Software                                                                   
  • K22090 Withdrawal Bulb
  • K23311 Rubber Stopper for Viscometer Tube, pk/12
  • K23350 Universal Viscometer Holder, Rectangle
  • K23351 Universal Viscometer Holder, Round
  • K23363 Modified Koppers Viscometer Holder, Round
  • K23381 Cannon-Fenske Routine Viscometer Holder, Round
  • K23382 Ubbelohde Viscometer Holder, Round
  • K23383 Cross-Arm Viscometer Holder, Round
  • K23384 Cannon-Ubbelohde Semi-Micro Viscometer Holder, Round
  • K23387 BS/IP/RF U-Tube Viscometer Holder, Round
  • 355-001-001 White Mineral Oil, 1 Gallon 
  • 355-001-003 White Mineral Oil, 5 Gallon 
  • 250-000-120C ASTM 120C Thermometer, 40 °C Test Temperature 
  • 250-000-121C ASTM 121C Thermometer, 100 °C Test Temperature