Surface Measurement Systems

Construction Materials		Custom built manifold: 316 stainless steel Seals: Viton^® and Kalrez^® or equivalent Tubing: 1/4 inch 316 stainless steel
Gas Flow Control		High accuracy digital mass flow controllers Wide dynamic range – turndown ratio 1000:1 Carrier gas: dry air, nitrogen, CO₂ (<1%) in nitrogen
Temperature Control	Temperature controlled enclosure	Contains entire generation and measurement system Control range: 5 °C to 85 °C Temperature stability ± 0.05 ^oC over 6 hours Temperature resolution 0.01 °C
	Local sample heater	Control range: up to 300 °C Heating ramp rates: up to 10 °C/min
Humidity Generation & Measurement	Water Reservoirs	500 mL quick-fit reservoir Heated to avoid evaporative cooling
	Relative humidity range	0 to 98% RH for 5-60 ^oC¹ 0 to 85% RH for 60-85 ^oC¹
	Relative humidity generation performance	Accuracy: ±0.5% RH² Resolution: ±0.1% RH Stability: ±0.1% RH over 6 hours
Measurement	Relative humidity continuous measurement	Range 0-100%RH
	Relative humidity measurement accuracy	±0.8% RH at 5-40 °C ±1.5% RH at 40-85 °C
CO₂ Generation and Measurement	Generation	Concentration range 0-100% vol, atmospheric pressure
	CO₂ generation performance	Accuracy: exact 3 or 0.5% vol of inlet concentration⁴
Measurement	Patented Speed of Sound sensor	Range: 0-100% vol⁵ Accuracy: 0.1% vol up to 40% vol, 0.5% above
	In line NIR ppm sensor^6,7	Range 0-0.5% vol Accuracy: 40 ppm⁵
Weight Measurement	Ultrabalance Low Mass	Maximum load: 1000 mg Mass change: ±150 mg Resolution: 0.01 μg Balance noise: ≤ 0.3 μg⁸
	Ultrabalance High Mass	Maximum load: 5000 mg Mass change: ±1000 mg Resolution: 0.1 μg Balance noise: ≤ 3 μg⁸
Hardware Configuration	Standard	Mixing of two gas streams, with controlled humidity and CO₂ concentration, respectively⁹ Switching between different carrier gases e.g. Nitrogen and 400 ppm CO₂
	Advanced	Two heated reservoirs for enhanced humidity generation at high CO₂ levels (up to 98% humidity in a pure CO₂ stream)⁹ Mixing and direct measurement of low CO₂ concentrations (ppm level) through dedicated instrumentation⁹
System Information		Dimensions: 520 mm (W) x 980 mm (H) x 610 mm (D) Weight: 80 kg (180 lb) Electrical: 200-240 V, 50/60 Hz, 1500 VA

DVS Control Software	• Live data view and plotting • Full control over all parameters • Powerful custom methods and sequences • Complex isotherm or isobar experiments • Temperature changes in a single experiment • Ramp or step methods available • Intelligent (dm/dt) or time-based step equilibration criteria • Multiple concentration or temperature cycles. • Automated video image or Raman spectra acquisition
DVS Analysis Software	• Automated isotherm calculation • Full kinetics information during experiment • Isotherm modeling • Enthalpy (heat) of adsorption • Permeability and diffusion modeling • Surface area models

DVS Control Software

• Live data view and plotting
• Full control over all parameters
• Powerful custom methods and sequences
• Complex isotherm or isobar experiments
• Temperature changes in a single experiment
• Ramp or step methods available
• Intelligent (dm/dt) or time-based step equilibration criteria
• Multiple concentration or temperature cycles.
• Automated video image or Raman spectra acquisition

DVS Analysis Software

• Automated isotherm calculation
• Full kinetics information during experiment
• Isotherm modeling
• Enthalpy (heat) of adsorption
• Permeability and diffusion modeling
• Surface area models