Navas Instruments, USA
TGA for Coal, Coke, Cement, Food, Mining
Model: TGA 1000 / TGA 2000
Key Features
- Determination of: moisture, volatile matter, ash fixed-carbon, and LOI (Loss On Ignition)
- Standards: ASTM D7582, ASTM D3173, ASTM D3174, ASTM D3175
- Single furnace or dual furnace controlled by one single PC
- The dual carousel (patented) thermogravimetric analyzer configuration allows automatic placement and removal of the upper crucibles or covers inside the furnace
- Integrated high precision balance with display
- Number of samples: 1 – 46
- Sample size: 0.1 – 70 grams
- Runs fully unattended, including overnight, with auto-recovery from a mains power interruption
- Compatible with oxygen, nitrogen and air (CDA) atmospheres
How the Dual-Carousel Works
A lower carousel holds the ceramic crucibles; an upper carousel holds their covers. During a run, the two carousels join and separate automatically to place and remove crucible-covers inside the hot furnace — without ever opening the furnace door.
Because the furnace never needs to be manually opened mid-run, samples aren’t exposed to sudden air ingress or oxidation, and volatile-matter results no longer depend on how quickly an operator can lift and replace a lid by hand. Both carousels also move to weigh crucibles directly on the furnace balance, so the whole test — loading, heating, weighing and unloading — runs unattended, including overnight.
Why It Matters
- Removes lid-handling variability
- Automatic cover placement eliminates operator-dependent volatile-matter results
- Reduces burn risk
- The furnace stays closed to its cover throughout the run
- Unattended operation
- Runs overnight with auto-recovery from a mains power interruption
Technical Specifications
Representative specifications for the TGA-2000-20 dual-carousel configuration (19 samples + 1 reference); single- and dual-furnace variants are also available across the TGA 1000/2000 range.
| Parameter | Specification |
|---|---|
| Sample capacity | 19 samples + 1 reference (20 total) |
| Temperature range | Ambient to 1000°C |
| Furnace | 220VAC, 4kW |
| Furnace temperature stability | ±1°C @ 105°C, ±2°C at other temperatures |
| Sample size | 0.1–10 grams |
| Weight loss/gain range | 0–100% |
| Instrument precision | Standard deviation ±0.0002 g |
| Balance | Integrated, 220g capacity, 0.0001g sensitivity |
| Carousel | Dual ceramic carousel & spindle for crucibles and covers (patented) |
| Crucibles included | 20 ceramic crucibles + 20 ceramic lids |
| Compatible gases | Oxygen, nitrogen, air (CDA) |
| Calibration | 50 editable calibration factors + 50 linear correction factors |
| Data export | ASCII, TXT, CSV, XLS; ODBC to LIMS/Excel |
Optional EB models add an external balance for higher throughput; D models add a second integrated furnace on the same PC, doubling capacity to up to 38 samples at once. Specifications shown are for the TGA-2000-20 configuration and may vary by model — consult Multiflo Instruments for other configurations in the TGA 1000/2000 range.
ASTM Standards for Coal and Coke
| Standard | Title | Determines |
|---|---|---|
| ASTM D7582 | Proximate Analysis of Coal and Coke by Macro Thermogravimetric Analysis | Moisture, volatile matter, ash and calculated fixed carbon |
| ASTM D3173 | Moisture in the Analysis Sample of Coal and Coke | Moisture determination |
| ASTM D3174 | Ash in the Analysis Sample of Coal and Coke | Ash determination |
| ASTM D3175 | Volatile Matter in the Analysis Sample of Coal and Coke | Volatile matter determination |
Applications
Purpose-built for coal and coke quality control — determining moisture, volatile matter, ash, fixed-carbon and LOI (Loss on Ignition) across up to 20 samples in a single, unattended run — with the same platform extending to a wider range of multi-sample materials.
Software & Data Management
Every system ships with Navas Instruments’ Windows-based analysis software, giving full control over test configuration, data collection and reporting.
Configurable Ramps & Holds
Set independent ramps, holds and gases per slope, with up to 8 custom-named sets of settings per slope.
Editable Calibration
50 editable calibration factors plus 50 linear correction factors, adjustable from within the software.
Auto-Recovery
Automatically recovers from a mains power interruption mid-run, with extensive diagnostics for failure investigation.
Database & Export
Results auto-save to a Microsoft Access database, with export to ASCII, TXT, CSV and XLS formats.
ODBC & LIMS Integration
Open Database Connectivity (ODBC) and Data Transmission Software support direct export to LIMS or Microsoft Excel.
Filtering & Sorting
Filter and sort collected data within the software for faster review and reporting.
To be arranged by the customer: a PC with Intel Core i5 or later, Windows 10, 6GB RAM (min.), 500GB HDD (min.), 6 USB ports, a DVD writer and a 19″+ LED monitor, plus compressed air/O₂/N₂ gases and regulators for oxygen, nitrogen and air.
Long-Term Ownership
Every electric and pneumatic part is available on the open market, with no dependency on a single supplier — though Multiflo Instruments maintains a complete parts and service department for customer convenience. Magnetic sensors are unaffected by dust, and the robust construction keeps vibration to a minimum.
This TGA platform is already relied upon by major power, steel, mining and research institutions across India.
Optional Accessories
- EB models
- Additional external balance (220g, 0.0001g) for increased productivity
- D models
- Additional integrated furnace on the same PC, doubling capacity to up to 38 samples at once
- Gas & utility accessories
- Nitrogen/oxygen cylinders, air compressor, pressure regulators, moisture filters, voltage stabilizer, UPS
- Reference standards
- Certified coal CRM sets (ash & volatile-matter reference materials) and calcium oxalate standard
Navas TGA: frequently asked questions
What does the Navas TGA 1000/2000 determine?
Moisture, volatile matter, ash, fixed carbon and LOI (Loss On Ignition). It is purpose-built for coal and coke quality control, and the same platform is used for cement, bauxite, minerals, food and soil.
Which standards are listed for the Navas TGA?
ASTM D7582, proximate analysis of coal and coke by macro thermogravimetric analysis (moisture, volatile matter, ash and calculated fixed carbon), and ASTM D3173, D3174 and D3175 for moisture, ash and volatile matter in the analysis sample of coal and coke. They are tabulated under Technical Specifications on this page.
How many samples can the Navas TGA test, and can it run unattended?
The range handles 1 to 46 samples of 0.1 to 70 grams. The TGA-2000-20 configuration holds 19 samples plus 1 reference, and D models add a second integrated furnace on the same PC for up to 38 samples at once. It runs fully unattended, including overnight, with auto-recovery from a mains power interruption.
How does the patented dual carousel work?
A lower carousel holds the ceramic crucibles and an upper carousel holds their covers. During a run the two carousels join and separate automatically to place and remove crucible covers inside the hot furnace without opening the furnace door, so volatile-matter results no longer depend on how quickly an operator can lift and replace a lid by hand.
What temperature range, balance and gases does the TGA-2000-20 use?
Ambient to 1000 °C, with a 220 VAC, 4 kW furnace and an integrated balance of 220 g capacity and 0.0001 g sensitivity. It is compatible with oxygen, nitrogen and air (CDA) atmospheres.
Is Multiflo the official India distributor for the Navas TGA?
Yes. Multiflo Instruments, based in Navi Mumbai, is the official India distributor for the Navas TGA 1000/2000 and maintains a complete parts and service department. The platform is already relied upon by major power, steel, mining and research institutions across India. Use the Contact Us button or call +91-22-44516175.
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