The Jewish Inventor Who Helped Transform Environmental Health and Air Safety

Today, there is widespread awareness of dangerous substances, air pollution, harmful chemicals, and radiation hazards. But a century ago, very little was known about these dangers. Factory workers and scientists who worked with phosphorus and other hazardous materials often suffered severe health consequences without understanding the cause.

Smoking was commonplace almost everywhere. Materials such as asbestos were widely used in construction. Even as recently as thirty years ago in Israel, soldiers trained in the Kishon River, which carried industrial waste from the Haifa Bay area. Environmental health and safety, as we know it today, is one of the youngest fields of human knowledge.

A Childhood That Sparked a Lifelong Mission

Charles Gelman was born in 1931 in the Jewish immigrant neighborhood of Manhattan's Lower East Side. His family had fled Ukraine because of pogroms and persecution against Jews.

At that time, many immigrants in America worked in large factories and industrial facilities, often spending long hours near machines that emitted steam, smoke, and other pollutants. These working conditions contributed to serious illnesses and health problems, though the connection between the environment and disease was not always understood.

As a young child, Gelman contracted rheumatic fever and spent a significant amount of time at Vanderbilt Hospital. His hospital experience sparked a fascination with medical devices used to measure substances within the human body.

He began asking himself:

• What if harmful substances in food could be measured?

• What if pollutants in the air could be detected?

• Could dangerous materials be identified in the environment before they caused harm to people?

These questions would shape the rest of his life.

Developing Technology to Detect Danger

Gelman later joined the chemical laboratories of the United States Army, where he worked on ideas for air sampling and the detection of nerve gases during wartime.

Because poisonous gases had been used as weapons during World War I, early detection was considered a major military priority.

Gelman developed a method for identifying nerve gas using an enzyme called cholinesterase. This enzyme reacts to nerve agents, making it possible to create a detection system capable of identifying dangerous gases in the environment.

He continued developing this technology and, by the late 1950s, had patented methods for detecting hazardous substances in the air and surrounding environment.

Exposing Hidden Pollution

Soon afterward, Gelman designed an air sampling device capable of detecting dangerous industrial emissions.

The invention caused a major scandal when it uncovered hazardous activities at a company called Creosote. The company had failed to report certain operations, but Gelman's equipment detected emissions of dangerous substances during nighttime hours.

The discovery revealed that the company had been secretly producing hazardous materials without proper disclosure.

A Pioneer in Air Purification and Medical Filtration

During the 1970s, Gelman founded a company specializing in:

• Human health monitoring

• Air quality testing

• Pollution detection

• Air filtration and purification technologies

Although he was not formally trained as a scientist, Gelman was an exceptionally creative innovator and entrepreneur who advanced the field through practical inventions.

One of his most important innovations was the microporous membrane — a thin sheet containing countless microscopic pores.

These pores are large enough to allow liquids and gases to pass through but small enough to trap contaminants, particles, and even bacteria.

The technology became the foundation for many modern filtration systems used in medicine, industry, and environmental protection.

Innovations in Blood Analysis

Another significant invention developed by Gelman was a device based on electrophoresis, a technique used to separate and identify substances within blood.

The machine could filter blood and detect antibodies while preserving the blood's properties. This required sophisticated engineering because many laboratory machines operate at temperatures that can damage blood samples.

His work helped advance diagnostic testing and biomedical research.

A Lasting Legacy

Today, the company founded by Charles Gelman is one of the world's leading filtration and environmental technology companies.

His legacy endures through innovations that help protect people from pollution, improve air quality, monitor environmental hazards, and support medical advances.

Long before environmental health became a global concern, Gelman understood the critical connection between the environment and human well-being. His vision, determination, and inventions helped shape the modern fields of environmental monitoring, air purification, and filtration technology, improving the lives of millions around the world.