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What is Vapor Pressure Analyzer?

The Vapor Pressure Analyzer is an instrument designed to precisely measure vapor pressure. As the name suggests, its core function is the accurate measurement of vapor pressure — however, SMS's instrument goes beyond simple pressure measurement, specializing in surface property analysis through its core technology.

The instrument's key capability lies in measuring how materials respond when exposed to various vapor environments — including water vapor and organic solvent vapors — enabling the evaluation of sorption and desorption characteristics, moisture sensitivity, surface hydrophilicity/hydrophobicity, and pore structure.

Unlike traditional BET analysis instruments, the Vapor Pressure Analyzer uses an ultra-sensitive microbalance to measure sample mass changes in real time. By capturing the minute mass changes that occur as vapors or moisture are sorbed onto or desorbed from the sample surface, the instrument enables quantitative analysis of physical properties and chemical reactivity.

This capability supports the quantitative analysis of hygroscopicity, stability, and structural changes in a wide range of materials, including pharmaceuticals, polymers, food, and building materials.

Key Features

Built on DVS Technology — Precisely measures mass changes during sorption and desorption of vapors (moisture or organic solvents)
Ultra-High-Sensitivity Mass Measurement — Detects mass changes down to 0.1 µg, enabling highly precise analysis
Accurate Temperature and Humidity Control — Operating range of 5–85 °C with 0–95% RH, reproducing diverse environmental conditions
Versatile Vapor Compatibility — Supports various organic vapors such as methanol, ethanol, and hexane, as well as mixed vapor experiments
Sorption/Desorption Hysteresis Analysis — Analyzes pore structure and irreversible characteristics of materials through hysteresis curves
Diverse Sample Compatibility — Accommodates samples in various forms, including powders, films, fibers, and polymers

Analysis Principle	Dynamic Vapor Sorption (DVS) — gravimetric analysis based on vapor sorption/desorption
Mass Sensitivity	0.1 μg or below — ultra-precision microbalance installed
Maximum Sample Mass	Approx. 1 g — usable from 1 mg to 1000 mg
Temperature Range	5°C ~ 85°C (or extended range option) — precision temperature control
Relative Humidity Control	0% ~ 98% RH — accuracy within ±1% RH
Vapor Types	Water, organic solvents (methanol, ethanol, acetone, etc.) — multi-vapor source configuration available
Response Time	Seconds to minutes — varies depending on sample and conditions
Data Acquisition Interval	1 sec ~ minutes (adjustable) — real-time mass change measurement
Software Features	Isotherm analysis, kinetics, diffusion modeling, automatic reporting — dedicated analysis software provided
Sample Types	Powders, films, fibers, porous materials, etc. — various sample holders available
Power & Size	Varies by instrument configuration — typically desktop form factor

What is the Vapor Pressure Analyzer?

The Vapor Pressure Analyzer is an instrument designed to precisely measure vapor pressure. As the name suggests, its core function is the accurate measurement of vapor pressure — however, SMS's instrument goes beyond simple pressure measurement, specializing in surface property analysis through its core technology.

The instrument's key capability lies in measuring how materials respond when exposed to various vapor environments — including water vapor and organic solvent vapors — enabling the evaluation of sorption and desorption characteristics, moisture sensitivity, surface hydrophilicity/hydrophobicity, and pore structure.

Unlike traditional BET analysis instruments, the Vapor Pressure Analyzer uses an ultra-sensitive microbalance to measure sample mass changes in real time. By capturing the minute mass changes that occur as vapors or moisture are sorbed onto or desorbed from the sample surface, the instrument enables quantitative analysis of physical properties and chemical reactivity. This capability supports the quantitative analysis of hygroscopicity, stability, and structural changes in a wide range of materials, including pharmaceuticals, polymers, food, and building materials.

Key Features

Built on DVS Technology — Precisely measures mass changes during sorption and desorption of vapors (moisture or organic solvents)
Ultra-High-Sensitivity Mass Measurement — Detects mass changes down to 0.1 µg, enabling highly precise analysis
Accurate Temperature and Humidity Control — Operating range of 5–85 °C with 0–95% RH, reproducing diverse environmental conditions
Versatile Vapor Compatibility — Supports various organic vapors such as methanol, ethanol, and hexane, as well as mixed vapor experiments
Sorption/Desorption Hysteresis Analysis — Analyzes pore structure and irreversible characteristics of materials through hysteresis curves
Diverse Sample Compatibility — Accommodates samples in various forms, including powders, films, fibers, and polymers

Analysis Principle	Dynamic Vapor Sorption (DVS) — gravimetric analysis based on vapor sorption/desorption
Mass Sensitivity	0.1 μg or below — ultra-precision microbalance installed
Maximum Sample Mass	Approx. 1 g — usable from 1 mg to 1000 mg
Temperature Range	5°C ~ 85°C (or extended range option) — precision temperature control
Relative Humidity Control	0% ~ 98% RH — accuracy within ±1% RH
Vapor Types	Water, organic solvents (methanol, ethanol, acetone, etc.) — multi-vapor source configuration available
Response Time	Seconds to minutes — varies depending on sample and conditions
Data Acquisition Interval	1 sec ~ minutes (adjustable) — real-time mass change measurement
Software Features	Isotherm analysis, kinetics, diffusion modeling, automatic reporting — dedicated analysis software provided
Sample Types	Powders, films, fibers, porous materials, etc. — various sample holders available
Power & Size	Varies by instrument configuration — typically desktop form factor