Demeter™ Food Microbiology Media Preparation Systems

Demeter systems were discontinued Apr 2, 2021. They will be supported until Dec 31, 2026.

Heateflex Demeter Dispense Heaters


Demeter™ is an innovative system for food microbiology lab testing that offers improved lab productivity, increased test accuracy, and greater sample traceability. Demeter™ automates media preparation steps in the food testing process. There’s nothing else like it on the market.


Demeter™ uses the patented Heateflex heating coil, used to heat the sterilized test water. Power is 9.6kW, 208 VAC, 3-ph, 27 amp. Demeter™ dispenses heated water at 203ºF (95ºC), with an accuracy of +/- 2ºC. Test dispenses may be programmed for 90 mL to 4L, with up to 16 recipes available.

Increase Testing Flexibility, Productivity, and Accuracy

Demeter™ offers lab technicians the flexibility to run multiple tests using different test media. Demeter™ heats and precisely dispenses sterilized water into food lab testing containers containing test media. Demeter™ enables testing labs to improve lab productivity and eliminate the autoclave step in the testing sequence by dispensing heated sterilized water directly into pre-sterilized test media in test containers. This approach allows food labs to greatly increase testing throughput. Regardless of whether a lab uses pre-sterilized media or bulk media, Demeter™ precisely dispenses each and every test sample, which significantly improves test accuracy, and minimizes test-to-test variability.


Demeter™ Systems Brochure

Owner's Manuals

Demeter™ Systems Manual

System Drawings

Demeter Facility Installation Drawing
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Features & Benefits

  • Automatically dispense sterile water with high precision, accuracy, and traceability for temperature and volume
  • Increase lab throughput with quick, high capacity performance
  • Procedural time savings entering the incubator at incubation temperature
  • Sterilization of components prevents bacteria growth through 3 methods: heat, UV, and filtration
  • Documented traceability throughout the system streamlines the audit procedure for yearly ISO 17025:2005 lab inspection
  • Lab-specific customization through programmable recipes
  • Volumetric dispense accuracy with secondary weight confirmation

System Process

Demeter™ tests for three common food pathogens: e coli, listeria, and salmonella. Operators can program Demeter™ for up to 16 separate media recipes, and test dispenses from 90 mL to 4 L. Three methods of sterilization-heat, UV treatment, and filtration-ensure that there’s no bacteria present in the testing process. Test results are highly traceable. The system features a bar code scanner that records sample information from each test, and can connect to a lab information management system (LIMS) to streamline the record keeping needed to maintain lab accreditation per ISO 17025:2005 standards.

Read this Food Quality & Safety magazine article to learn how a food testing lab uses Demeter™ systems to increase their testing productivity.

Demeter™ Videos

Demeter™ System Introduction

Demeter™ Improves Workflows


Ideal applications include environmental, food microbiology, and food manufacturing QA/QC labs conducting pathogens testing for the following:

  • e coli 0157:H7
  • Listeria
  • Salmonella

Demeter™ assists in automating media preparation with many media reagents, including the following:

  • BPW- Buffered Peptone Water
  • BPBW- Butterfield’s Phosphate Buffered Dilution Water
  • TSB- Trypicase Soy Broth
  • LB- Lactose Broth
  • Fraser Broth
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Heater Patented Heateflex heating coil
Power 9.6 kW, 208 VAC, 3-ph, 27 amp
Dispense capability 90 mL- 4L
Temperature 203ºF (95ºC)
Temperature Accuracy +/- 2ºC (dependent on customer’s facilitation)
Dispense accuracy +/- 2%
Scale accuracy +/- 1%
Filtration 3 filters, final filtration to 0.2 μm
UV lamp 254 nm
Recipes 16 recipes/dispenses for volume and heat
Thermocouple NIST traceable
Communications Non-volatile data storage for the 100 most recent dispenses; interface to LIMS