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Home  >>  Products  >>  Measuring Instruments  >>  Prep ASH

Thermogravimetric Analyzer (TGA)

Automatic analysis of Moisture, Volatiles, Ash, Fixed Carbon, Special application for Coal & Coke as per ASTM D5142-09


The prepASH® Series 340 represents the highest level of thermo-gravimetric analysis and offers revolutionary improvement of sample preparation, analysis and documentation.

  • Made In Switzerland
  • Color Touchscreen
  • External Calibration
  • Alpha-numeric Keypad
  • RS-232 Interface
  • USB Interface
  • Supports IQ/OQ/PQ
  • 4 Second Response Time
  • Clock (Printout, GLP, GMP, Auto-Cal)
  • Communication Options (USB, Bluetooth, Wireless)




  • Fully automatic thermo-gravimetrical analysis with end-point recognition replaces drying oven, muffle furnace and analytical balance
  • 3 Models in prepASH® Series 340 for 12, 19, 29 samples are optimum solution for each application
  • Built-in high performance analytical balance 0.0001g
  • Selectable atmosphere (N2, O2, Air)
  • Easy operation of the instrument from color touch screen built-in computer (Windows)
  • Real-time evaluation of weight loss during the drying and ashing process is shown directly on the prepASH display and via network to external computer
  • Various communication ports: Ethernet, 2 USB ports (for PC, Printer, Barcode reader, Keyboard)
  • Printout: complete report with Graphics, Tables, Method and Statistics
  • Error free protocols and reports


Technical Data

Technical Data
Model prepASH 212 prepASH 219 prepASH 229
Capacity: 120 g
Readability: 0.0001 g
Repeatability: 1 g / 0.2 ‰ / 10 g / 0.02 ‰
Response Time: 4 seconds
Temperature Stability: +/- 2%
Weighing Units / Functions Displayed: % moisture, % solids, time, temperature
Moisture Range: 0.01% to 100%
Timer Range: Up to 36 hours
Temperature Range: 50 - 1,000°C
Power Source: 230 VAC
Display: Large color touchscreen display
Crucibles: 12 psc. / 40 ml 19 pcs. / 35 ml 29 pcs. / 35 ml
Overall Dimensions
WxDxH (H with cover open):
23.2" x 3.4.2" x 24.4" (590 x 870 x 620 (980) mm)
Operating Environment: + 40°F to + 90°F / + 5°C to + 33°C
Connectivity: RS-232 interface
Net Weight: 125 lb / 57 kg
Shipping Weight: 200 lb / 90 kg

Analysis of Coal & Coke as per ASTM D5142-09

  • Massive reduction in the work-load through the simultaneous evaluation of the Moisture, Volatiles, Ash and Fixed Carbon content of up to 29 samples in one cycle
  • Standard Analysis is easily transferred to prepASH® Series 340 and validated
  • Optimisation of analysis time up to 70%
  • Automatic calculation and documentation of Moisture, Volatiles, Ash and Fixed Carbon values
  • Automatic cycle ensures best reproducibility, quality and throughput
  • Graphical report of measuring values, either single or in groups, with sample recognition in color


Moisture and volatile matters are determined under protection nitrogen atmosphere. The ashing step is done under oxidizing atmosphere with oxygen. prepASH® must be equipped with the gas flow control unit. Included in the supply are Al2O3 crucibles with covers, steel turn-table and tweezers.

Reference Coal and Calibration

Reference material is used to calibrate the methods for the determination of volatile matter and content of samples. prepASH® is delivered with a standard method and pre-calibrated with 3 standards. Customer calibration: the reference materials must cover the full range of expected volatile matter contents of the coal and coke samples that will be routinely analyzed.

Analysis Time/Method and Procedure

2 to 5 hours analysis time. Standard analysis is easily programmed on the prepASH® Series 340. The user is guided through the manual steps such as weighing in, covering and uncovering the crucibles.
  1. Load crucibles into the furnace carousel and weight all the crucibles automatically.
  2. Load the samples in the crucibles and weigh them.
  3. Press "Start".
  4. Cover crucibles after drying.
  5. Uncover crucibles before ashing.
  6. Automatic printout of report at the end of analysis.

Typical Results




Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
BL-406001 prepASH 212 $58,118.00
BL-406003 prepASH 219 58,118.00
BL-406005 prepASH 229 63,499.00
BL-406109 Turntable holder 1,134.00
BL-406121 Crucible tweezers 42.00
BL-406123 Crucible tweezers for crucible lid handling 315.00
BL-406125 Turntable for 29/19 samples, SiC, for prepASH 229 and prepASH 219 P.O.R.
BL-406127 Turntable for 12 samples, SiC, for prepASH 229, 219 and 212 809.00
BL-406129 Crucible, silicate ceramic, set of 5 pieces, use with turntable 29/19 110.00
BL-406131 Crucible, Al2O3, set of 5 pieces, use with turntable 29/19 247.00
BL-406133 Crucible for use with lid Al2O3, set of 5 pieces, use with turntable 29/19 and crucible lid 184.00
BL-406135 Crucible lid, Al203, set of 5 pieces, use with turn-table 29/19 and crucible 89.00
BL-406137 Standard crucible, silicate ceramic, set of 5 pieces, use only with turn-table 12 and adapter 131.00
BL-406139 Crucible 50ml, Al203, set of 5 pieces, use only with turn-table 12 and adapter 340.00
BL-406141 Adapter for standard crucible, silicate ceramic, set of 5 pieces use only with turn-table 12 and standard crucible or other crucible available from the market 131.00
BL-406143 3 inputs gas flow control unit for N2, O2 and air 1,937.00
BL-406145 prepSTATION includes: prepSTATION unit, EP 120A analytical balance, Data cable RJ45, l = 0.7m for the connection between prepSTATION and balance 7,429.00
BL-406147 Scrubber K-415 (condensation-neutralization-adsorption unit) for e.g. determination of sulfated ash 7,429.00
BL-406149 Connection set for scrubber 809.00
BL-406151 ECD (enhanced cooling device) 3,355.00
BL-406153 ECD (enhanced cooling device) as retrofit kit 3,690.00
Note: Paid installation is required and not included in pricing. Standard installation is 2-days, budgetary estimate $4,500 (Contiguous US, Most Canada Locations). Extra days required by failure to meet site-prepared condition will be an additional billing of $1,000/day.


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