Columbia Analytical Instruments (CAI) is a Columbia SC (USA) based manufacturing business of innovative laboratory products. Here we make the SmartBlock line of block digesters. They include a 100 position COD block digester and a 56 position trace metals digester. We also manufacture premium quality COD tubes in the 5-150ppm, 20-1500ppm and 20-900ppm for NPDES compliance monitoring. Mercury free versions are available. Our price is unbeatable, especially in this uncertain economy. We also OEM COD tubes to lab supply companies. Inquire with us soon!

About Us

Our History:

  • Columbia Analytical Instruments was conceived in the early 2000's as a department of Columbia Analytical Laboratories, originally(incorporated in 1986. This mid-sized lab served clients successfully all over SC for 17 years.
  • In 2003 the lab was sold and CAI (Columbia Analytical Instruments) was formed as a stand-alone manufacturing facility.

Our Mission:

  • Our Mission has always been world-class service using the years of analytical laboratory experience as a solid foundation moving forward.

Our Goal

  • The Goal at CAI is to place ourselves in out clients shoes. Knowing the laboratory market is both price and quality sensitive, our products are thoroughly evaluated prior to launch.
  • Using our experience as a base, every aspect of production is vetted to ensure innovative quality control strategies and cost effective procedures result in first class products our partner laboratories find indispensable.

From the Mountains to the Beaches

  • South Carolina is a place of breathtaking beauty and elegant, friendly people.
  • The staff at CAI feel blessed and more than a little fortunate to be where the winters are mild (but still an occasional snowfall) to Famously Hot in the summertime


CAI - COD Tubes

COD Tubes are produced using ACS/Primary Standard  Grade chemcials and our Method has received EPA Acceptability. Tubes come economically packaged in cases of 300 (2 inner boxes of 150).

SmartBlock - Model 125 - Trace Metals Disgestion Block

The SmartBlock 125 is a trace metals disgestion block which can digest 56 water, wastewater, TCLP digestion extracts, soils and other sample types. Two transport racks are included which can quickly and safely insert and remove the 50-ml centrifuge tubes which serve as digestion containers. Two sizes are available, 56- and 28-position SmartBlocks (56 position shown above).

Company details

Business Type:

Industry Type:
Monitoring and Testing - Laboratory Equipment

Market Focus:
Nationally (across the country)

Year Founded:


less than $1,000,000 US

Office & Distributor locations:


Environmental XPRT is part of XPRT Media All Rights Reserved