Barnstead International Thermolyne Dri-Bath Model: DB28125 and Z1800

Barnstead International Thermolyne Dri-Bath Model: DB28125 and Z1800

**This unit has been tested to specifications. Has slight cosmetic blemishes from normal use. Has missing One needle valve. See photos for further details. 

The Barnstead/Thermolyne DB28125 Single-Block Dri-Bath Heater features a solid state electronic control to accurately maintain temperature of tube contents. Holds up to three heating blocks, each with a thermometer well for verifying temperature. Equipped with power switch and separate power and cycle light. The Thermolyne D28125 Dribath heat block provides both low and high range thermostat options with capacity of three modular heat blocks. Low range runs from 30 to 80C and high range from 70 to 140C. Temperature stability of 0.5C. 

• Temperature stability: ±0.5°
• Temperature range: 30° to 140°C

The instrument consists of a base and stand assembly, a sample holder, and a gas distribution system. Test tubes (or other containers) can be held in position by the Zirconia beads. Each position is numbered. Gas passes through a constant pressure manifold assuring an equal access to each valve to the amount of gas needed. Gas is supplied by a flexible 1/4” od. x 1/8” id silicone tube to the manifold, inert red polyurethane tubing supplies each needle valve with gas from the manifold. The depth can be lowered to any desired height. The height depends on the container, bath temperature , the solvent to be evaporated, and flow rate of the evaporating gas. Evaporation rate depends on both temperature and flow rate of the gas. Flow can be adjusted with the individual needle valves. Gas pressures up to a maximum of 40 psig can be utilized. Most applications require only 10 to 25 psig. All materials used are laboratory quality and can be used with all standards organic solvents and water including mild acid and bases.

Cole-Parmer Instruments Z1800 Cat# 28680-30 Evaporator and Concentrator is designed to provide rapid evaporation of solvents or water for 18 samples, test tubes or containers. It is supplied with a triple block heater. It includes 18 individual needle valves for controlling the flow to each positions containers. It is designed to be easily accessible with the geared height adjustment and a manifold swing away platform. 1 to 18 samples can be utilized for evaporation at any time.

Features

• Compact size to take minimal space
• Rectangular manifold plate that pivots 90 forward and backward, and it will rotate 360° horizontally for easy access to needles and valves.
• Rack to be able to insert different tubes and easily align the needles for evaporation
• Accomodates tubes or containers from 8 mm to 25 mm diameter with volumes from 1 ml to 50 ml.
• 18 individual fine needle control valves
• 18 stainless steel needles 4 inch x 16-gauge

Typical Evaporation Rates