Bulk Material Analyzers & Process Controls

ETI designs, manufactures, installs, and services online bulk material analyzers and process control equipment. ETI online analyzers are used in the coal, cement, minerals, and wood/biomass fuel industries to optimize production and to ensure consistent quality in the end product.


Our analyzer product line ranges from PGNAA units providing full elemental analysis to dual-gamma instruments measuring ash, moisture, heating value, and weight/density, as well as single-gamma analyzers measuring weight/density. These online analyzers provide real-time information for plant operators and plant control systems allowing them to make process control decisions immediately based on material measurements.

Additionally, ETI designs and manufactures high speed sort gates and custom sorting/blending equipment. These devices can be directly controlled by an analyzer or by plant control systems to sort and blend materials based on analysis data.


Dual-Gamma Ash Analyzer

The Model DGA-410 Dual-Gamma Ash Analyzer (Ashmeter) is a registered nuclear gauging device for measuring ash content and weight of bulk materials.

Process Control Analyzer

Process Analyzer

The Model 600 Process Analyzer is a registered microwave/nuclear gauging device for measuring ash, weight, and moisture content of bulk materials.

Density Meter

Density Meter

The Model 500 Density Meter is a registered nuclear gauging device for measuring weight of bulk materials.


Full Stream Elemental Analyzer

The ETI Model FSEA Elemental Analyzer combines a Prompt Gamma Neutron Activation Analyzer (PGNAA) and a Density/Ash/Moisture gauge for measuring the full elemental and moisture percentages of various materials including coal, cement products, minerals, and wood products as they are transported on a conveyor.

Sort Gate

High Speed Sort Gate

The Model HSG1 High Speed Sort Gate is a rugged gate assembly for separating materials based on quality. The gate works in conjunction with ETI's Dual-Gamma Analyzer or Process Control Analyzer, and is automatically controlled based on the analyzer measurements taken vs. the set-points controlled by the operator. Manual controls are also supplied.

BTU Meter

BTU Meter

The Model 510 BTU Meter is a registered nuclear gauging device for measuring ash, moisture, heating value, and weight of coal as it travels through a boiler feeder pipe.

Units Installed

Sort Gates
Dual-Gamma Analyzers
Process Control Analyzers
Elemental Analyzers


Field Service

Field Service & Maintenance

Accurate, reliable operation of our products is critical to our customers' success. ETI maintains factory service personnel and field crews to quickly respond to technical and mechanical service issues. Technicians are available directly by phone and can access the equipment via secure VPN connections to address service and support inquiries.

Radiation Services

Radiation Services

ETI provides radiation services for both our equipment and for equipment made by other manufacturers. We provide leak testing, source replenishment, radiation safety training, and radiation program auditing.



ETI will install and configure your equipment on-site and will work with your engineers to comply to site-specific requirements. We will also provide technical assistance and drawings to facilitate any work done by you or your contractors.

Maintenance Agreements

ETI offers maintenance agreements on a quarterly, bi-annual, or annual basis. A maintenance agreement guarantees periodic service visits, radiation leak testing, and unlimited remote support. Remote support is accomplished through a VPN connection permitting an ETI technician to access your system's computers and devices to perform troubleshooting, diagnostics, calibrations, and upgrades.

Request Quote

General Service

Dual-Gamma, Process Control & BTU Meter Service

  • Radiation leak tests
  • Calibration
  • Computer maintenance
  • Database maintenance
  • Software upgrades
  • Inspection & general maintenance
  • Unlimited remote support

FSEA Service

Full Stream Elemental Analyzer Service

  • Radiation leak tests
  • Calibration
  • Computer maintenance
  • Database maintenance
  • Software upgrades
  • Inspection & general maintenance
  • Unlimited remote support
Radiation Safety Service

Radiation Safety Service
(Any Nuclear Gauge)

  • Radiation leak tests
  • Shutter tests
  • Source replenishment
  • Radiation Safety Training
  • RSO & User Training
  • Physical Inventory
  • Troubleshooting, repair, & decommissioning

Frequently Asked Questions

What is "Online Analysis"?

Online vs. Offline

Online analysis is the measurement of material characteristics in real-time. ETI's analyzer products use a no-contact non-destructive...more...

How will an analyzer help my process?

Instantaneous results; immediate actions

ETI's analyzers provide near real-time feedback, allowing process control decisions to be made as material is being processed...more...

Which analyzer do I need?

A guide to equipment selection

The table provided here shows the capabilities and comparisons of ETI's analyzers.

Open Document

What is SGA, DGA, & PGNAA?

Definition of terms

Single Gamma Analysis, Dual-Gamma Analysis, & Prompt Gamma Neutron Activation Analysis. These terms are used throughout this site and are defined here for clarity...more...

Does flow rate affect analysis?


Flow rate has no effect on analysis.

How often must an analyzer be recalibrated?

Rarely, if ever

ETI analyzers are calibrated after installation using samples made from the materials used in the existing process. Laboratory analysis is performed on the samples and a comparison is done with the analyzer results. Analyzer results are then adjusted to match the laboratory analysis...more...

About ETI

Energy Technologies Inc. (ETI) was founded in 1994 to design, manufacture, install, and service products for the coal mining and coal fired utility industries. Since its inception, we have focused on providing our customers with accurate, rugged, and dependable products to help reduce production costs and improve product quality. ETI operations are maintained from our facility in Maryville, Tennessee. Customers include major mining, cement, utility companies, and paper mills across the United States, Canada, Mexico, Australia, Germany, and Italy. Our installed customer base of control systems exceeds 200 users. Our success can be attributed to both the quality of our products and the dedicated service we provide after the sale.



1741 Triangle Park Drive
Maryville, Tennessee, USA