About Sandstone Diagnostics


Sandstone is an innovative technology and healthcare start-up company producing medical products and research tools designed to improve healthcare by bringing the point of care closer to the patient, increasing access, reducing costs, improving sample preparation, and enhancing performance of bodily fluid analyses including blood and semen.  

Sandstone specializes in innovation that reduces the size and power requirements for applying centrifugal force to separate, stabilize, and analyze clinical samples.  Advancements in microfluidics and mesofluidics work hand in hand with the centrifuge innovation to create CentriFluidics™. CentriFluidics is a new capability that combines the power of innovation in both of these fields transforming the analysis process and enabling cost savings, performance improvement, and access to health care to millions who are not reachable today.

Sandstone first commercialized its CentriFluidic technology with the Trak Male Fertility Testing System –  an FDA approved at-home consumer device that can be mass produced and marketed to the millions of people trying to start their family. Trak is sold in multiple channels and has proven that microfluidic and mesofluidic consumables can be mass produced in consumer friendly, at-home use products designed to extend access to health information and care.

The Sandstone Way

Sandstone is made of an incredible group of scientists, researchers, marketers, and professionals that believe in challenging the status quo and acting with a sense of urgency to solve some of healthcare’s biggest challenges with improvement in technology and by empowering patients and caregivers.  We have a track record of success, demonstrated agility, and an approach to partnership that places the needs of our customers first, ahead of our own to create a model of shared success.


Karen Drexler, Sandstone Diagnostics CEO

Karen Drexler

Paul Manners, Sandstone Diagnostics CFO

Paul Manners

Greg Sommer, Sandstone Diagnostics Founder & CSO

Greg Sommer
Founder and CSO

Ulrich Schaff, Sandstone Diagnostics Founder & CTO

Ulrich Schaff
Founder and CTO

Sara Naab, Sandstone Diagnostics Founder & Trak Coach

Sara Naab
Founder and Trak Head Coach

Marc Rosenstock, Sandstone Diagnostics VP of Marketing

Marc Rosenstock
VP of Marketing

Scientific Advisory Board

Michael Eisenberg, MD

Director of Reproductive Medicine, Stanford University Medical Center

Jamin Brahmbhatt, MD

Co-Director, PUR Clinic; Co-Founder, Drive for Men's Health

Joseph Alukal, MD

Clinical Associate Professor, NYU Langone Health Department of Urology

Douglas Carrell, PhD, HCLD

Professor of Surgery, Human Genetics, and ObGyn

In the News

Sandstone has been making news and headlines since we started transforming healthcare with new technology and by challenging assumptions in old processes. Below are many of our mentions in the press.  If you have a press inquiry, please contact us using the form below. You can also check out additional press and news information related to Trak Fertility on TrakFertility.com.


EIN News Desk: Sandstone Diagnostics Announces First Pilot Study for Zero Delay Plasma System (February 6, 2019)

New York Times: The Dawning of Sperm Awareness (Jul 25 2018)

MedCity News: When healthcare devices go over the counter (Jul 25 2018)

Fatherly: How to Cope with Male Infertility (Jul 12 2018)

CNET Magazine: Can fertility monitors for men and women help couples get pregnant? (Jul 5 2018)

U.S. News & World Report: 9 Myths and Little Known Facts About Male Fertility (June 12 2018)

Scantily Dad: Sperm Counts Have Dropped by 52% In The Western World (April 12 2018)

MobiHealthNews: NIH-funded study to use Trak, a home fertility test for men (Mar 30 2018)

The Greatist: Can Sex Legitimately Help You Sleep Better? (Mar 23 2018)

Latest Gadgets: Keep Track of Your Fertility With Trak (Feb 6 2018)

Fast Company: Can Silicon Valley Get You Pregnant? (Jan 30 2018)

360DX: Male Fertility Testing Firm Sandstone Dx raises $5.8M (Jan 16 2018)

Guardian: Can a DIY fertility test help you plan when to have a baby? (Jan 21 2018)

Insider: Why you should start thinking about your fertility in your 20s — even if you aren’t ready to have kids yet (Oct 26 2017)

Fit Pregnancy: Low Sperm Count is a Major Issue—Here’s What You Can do About It (Oct 20 2017)

Newsweek: What’s Killing America’s Sperm? Male Infertility Crisis Has Experts Baffled (Cover Story, Sept 22 2017)

Men’s Health Magazine: Trak Named #1 New At-Home Health Test (Sept 2017)

Medgadget: Sandstone Diagnostics offers first at-home test to measure sperm count (Aug 4 2017)

Rewire: Want to Make a Baby? These Products Can Help (June 8 2017)

MedCity News: Test your sperm count at home with Sandstone Diagnostics’ Trak device (May 25 2017)

Fox Business: At-Home Fertility Kit Just for Men a Top Seller on Amazon (May 5 2017)

Publications, Grants, & Awards

  • NIH SBIR #1R43AI108206-01A1 “Ultra-Sensitive Point-of-Care Toxin Diagnostics” (PI Greg Sommer, PhD)
  • NIH SBIR #1R43HD76536-01A1 “Rapid, Point-of-Care Diagnosis of Neonatal Sepsis” (PI Greg Sommer, PhD)
  • NIH R21 #1R21HD094322-01 “Feasibility of in-home semen testing in a North American preconception cohort study” (PI’s Lauren Wise, SCD & Michael Eisenberg, MD)

Join Us.

If you would like to join us on our journey in making healthcare more accessible and improving the quality for millions around the globe or contact us for any other reason, please complete the form below. We will get back to you as soon as we can.