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About Us
100% Employee-Owned • 4 Generations Strong
Precision is a
Precision is a
Family Tradition.
From the first stainless steel filter holders in 1954 to the global ESOP leaders of 2026—we are fathers, daughters, neighbors, and owners building the future of air science.
72+ Years
Building Trust in Cleves, Ohio
The Tisch Advantage
We take customer service personally. If you have a question, you do not get bounced around—you get a partner in Cleves.
How We Support
- Phone and email support answered by our team in Cleves
- Help selecting the right sampler and configuration
- Practical troubleshooting and parts support
- Custom builds for unique applications
What We Build
Known for high volume air sampling, particulate, metals, volatiles, and specialty monitoring. Our line includes:
- High Volume (TSP, PM10, PM2.5, PUF)
- Federal Reference Method (FRM)
- Low Volume Sampling Equipment
Our Mission
Provide reliable, high quality air monitoring instrumentation and back it up with customer service that is responsive, direct, and rooted in 70+ years of heritage.
A Journey Written in Steel & Science
Click any era to see the clickable photos and stories that defined environmental monitoring.
1954 — 1969
GMW's price list from 1967.
The iconic Model 2000 TSP Sampler.
The GMW Era & Model 2000
GMW's price list from 1967.
The iconic Model 2000 TSP Sampler.
The Spark of Air Science
In 1954, Web Tisch purchased General Metal Works (GMW). Throughout the 50s and 60s, GMW fabricated blower motor assemblies for the U.S. Public Health Service, leading to the development of the first Total Suspended Particulate (TSP) High Volume Air Sampler—the Model 2000.
1970 — 1989
The Avalon theater in the 1940's.
Pictured: Wilbur (son) and Web (father) Tisch at a 1970's trade show.
Growth & Change
The Avalon theater in the 1940's.
Pictured: Wilbur (son) and Web (father) Tisch at a 1970's trade show.
A New Home for Innovation
1970 marked a turning point with the formation of the U.S. EPA and the purchase of the Avalon Theater for GMW production. We expanded by buying the neighboring butcher shop and adding a high bay building in 1980.
1990 — 1999
TEI's first show in 1998.
Tisch Environmental is Born
TEI's first show in 1998.
Bringing it Back
In 1998, W. John Tisch and Jim Tisch took a stand and founded Tisch Environmental, Inc. (TEI), ensuring the heritage of precision air sampling stayed local and family-led.
2023 — 2026
Every face here is an owner.
100% Employee Owned
Every face here is an owner.
The ESOP Promise
In 2023, TEI became 100% employee-owned. Today, the people welding the frames and answering your calls are owners of the company.
You're in Good Company
Here’s what the people we serve are saying on Google.
★★★★★
"Tisch literally invented hi-volume air samplers over 50 years ago! Their customer service is second to none!"
— Kirk S.★★★★★
"Tisch Environmental offers top quality instrumentation and unbeatable customer support. Best in the industry!"
— Danny R.★★★★★
"Tisch Environmental has always been a great to work with. Fast turn around on my orders."
— Anthony P.★★★★★
"With decades of product development and manufacturing, Tisch equals quality."
— Kris K.★★★★★
"Tisch literally invented hi-volume air samplers over 50 years ago! Their customer service is second to none!"
— Kirk S.★★★★★
"Tisch Environmental offers top quality instrumentation and unbeatable customer support. Best in the industry!"
— Danny R.Everything you need to move forward.
Meticulously organized materials so you can spend less time searching and more time sampling.
Frequently Asked Questions
Shipping & Returns
We ship daily from our Cleves dock via UPS, FedEx, and Freight. Standard units may be returned within 30 days with a valid RMA.
Your Privacy
We use your data only to facilitate orders and provide technical support. We do not sell information to third parties.
Technical & EPA Compliance
Orders & Account Management
Support & Security
Are your samplers EPA Compliant?
Yes. Tisch Environmental is a leading manufacturer of EPA Federal Reference Method (FRM) and Federal Equivalent Method (FEM) instrumentation. Check individual product datasheets for specific designation numbers.
How often should I calibrate my equipment?
Calibration intervals vary by EPA method and site conditions, but we generally recommend a full calibration check quarterly or after any major component replacement. We offer NIST-traceable calibration orifices for field use.
Where can I find manuals or parts lists?
All technical manuals, exploded views, and parts lists are proprietary property of Tisch Environmental. They can be accessed directly through our "Reference & Manuals" section or by contacting support.
Do I need to set up an account with you?
No, an account is not required; you are welcome to check out as a guest. However, creating an account allows for faster checkouts and keeps your order history on file. An account is required if you'd like to apply for tax-exempt status or net terms.
How do I manage my account details?
You can manage your information, payment options, and saved addresses by visiting tisch-env.com/customer-account and signing in.
How do I apply for tax-exempt status?
Tax-exempt status must be verified and approved prior to order placement. Please create an account and email your valid state exemption certificate to our sales team before checking out.
What forms of payment do you accept?
We accept all major credit cards and PayPal. We also offer net terms to qualifying customers at our team's discretion; please reach out to [email protected] for more information.
What is your return policy (RMA)?
A Return Merchandise Authorization (RMA) is required for all returns or repairs. Standard items in new condition can be returned within 30 days, subject to a restocking fee. Custom-built units are non-returnable.
Who answers the phone?
A Tisch Environmental employee sitting in our Cleves office. No robots. You get direct access to owners and experts who know the equipment inside and out.
I've forgotten my password
You can reset your password by visiting tisch-env.com/forgot-password. Enter your email address and we will send you a reset link immediately.
What are cookies? Do I need them enabled?
Cookies help our site remember your preferences and keep items in your cart. We recommend enabling them to ensure a smooth experience when logging in or completing a purchase. They do not store sensitive personal information and can be cleared at any time.
What are your typical lead times?
Lead times vary by product. Standard consumables (filters, motors) often ship within 24-48 hours, while full sampling stations typically have a 2-4 week lead time depending on current production volume.
Ready to Talk Shop?
Click below to open our official Customer Service portal. One of our owner-experts will reach out personally within 1 business day.
Open Service & Quote Request Form
SECURE NETSUITE CUSTOMER PORTAL • 1-DAY RESPONSE TIME