DVS Endeavour

5X Parallel Gravimetric Sorption Analyzer

A key feature of DVS Endeavour is the ability to precisely control and measure temperature and relative humidity while simultaneously recording the highest resolution changes in mass on up to 5 samples. Additionally Organic vapor partial pressures can now be directly measured using Surface Measurement Systems’ Speed of Sound sensor (patent pending). In a typical experiment a known concentration of water vapor or organic vapor is delivered over a sample placed inside the sample pan. The sample pan is connected to the Surface Measurement Systems Ultrabalance™ measuring real-time mass changes caused by sorption or desorption of water and/or organic molecules.

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Outstanding capabilities

Simultaneous 5X sample measurement
Organic and Water vapor sorption kinetics
Organic vapor sorption in a fixed RH background
Real time partial pressure measurement and control
Water and organic vapor sorption isotherms from 10 to 70 °C
In-situ drying of samples to 200 °C
Optional Color Video Microscopy
True0™ drying at 0.0% RH

Specifications
Schematic

Specifications

Temperature

Temperature controlled enclosure
Control range: 10°C to 70^oC
Regulation accuracy: ± 0.02^oC
Enclosure provides anti-condensation protection.

High temperature pre-heater for sample drying/activation

Delivers local sample temperatures of up to 200 °C
Heating ramp rates: up to 10 °C / min
Sensors: Pt-100 thermocouple

Endeavour Stand

Manifold: 316 stainless steel
Seals: Viton
Tubing: 1/4 inch stainless steel

Water Reservoir

Material: glass
0.5 and 1L as standard

Relative humidity generation and measurement

High accurate digital mass flow controllers and capacitance probe

Organic Vapor Generation and Measurement

High accuracy digital mass flow controllers for vapor and gas delivery

Relative Humidity Sensor

Capacitance probe

Carrier Gas – Dry air or Nitrogen
Relative humidity range from 0 to 98%
RH range accuracy from 5 – 60 °C ±1%
RH range accuracy from 60 – 85 °C ±2%

Speed of Sound Sensor for organic vapors

Carrier Gas – Dry air or Nitrogen
Partial Pressure range from 0 to 90%
Partial Pressure accuracy from 10 – 70 °C ±1%

System Software

Next generation purpose built control and evaluation software for the most advanced experimental design and data analysis.

DVS Control

Complex protocols for multiple experimental sequences using sample pre-heating and conditioning; isotherm, isobar and ramped humidity and organic vapor methods; single or dual vapor delivery and control; fixed time or mass derivative steps.

Multiple-method protocols incorporating:
• Sample pre-heating
• Vapor sorption
• Vapor exchange
• Dual vapor co-adsorption
• Temperature changes in a single experiment, including
• Ramp or step changes in relative humidity
• Automated video image acquisition
• Organic vapor sorption partial pressure
• Temperature stages may be based on fixed-time or user defined dm/dt criteria
• Complex isotherm experiments
• Experiments may include half, full or multiple partial pressure or temperature cycles

Analysis
• Isotherms
• Permeability and diffusion
• Kinetics information
• Heat of sorption
• Tg determinations
• Amorphous content
• BET

21CFR Part 11 software solution is available for all DVS software upon request.

Mass measurement

UltraBalance™ low mass
Sample mass: between 1 and 1000mg
Mass change: ±150mg
Resolution (precision): 0.1 μg
Root mean square
balance noise: ≤ 0.3 μg

UltraBalance™ high mass
Sample mass: between 10 and 5000mg
Mass change: ±1000mg
Resolution (precision): 1 μg
Root mean square
balance noise: ≤ 3 μg