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Specifications

Technology The MOLA moisture head consists of a radioisotope neutron source with appropriate shielding and an ion chamber neutron detector.The source emits high-energy (fast) neutrons which passthrough the hopper wall into the process material and are scattered by repeated collisions with the other types of nuclei in the process material, including the hydrogen in the moisture. While the fast neutrons lose little energy in collisions withcarbon, oxygen and the other nuclei, collisions with hydrogen nuclei convert them to low-energy (thermal neutrons). The number of thermal neutrons produced is proportional to the density of the hydrogen in the process material. The detector produces a current output for every thermal neutronthat strikes it, generating a signal that is proportional to this hydrogen density. If all the hydrogen in the process material is contained in the moisture, or if there is a constant amount ofhydrogen contained in other forms, the current rate from the detector can be calibrated in terms of weight of moisture per unit volume. This rate can be calibrated in terms of the percent-by- weight moisture if the bulk density of the process material is reasonably constant or if optional bulk density compensation is provided.

MOLA & MOLA-LS - Moisture On-Line Analyzers - 23500 Thermo Scientific MOLA

General Specifications Moisture Gauge Head3 components, none weighing more than 20.4 kg (45 lbs); Total weight 44.5 kg (98 lbs) Response Time Constant4 sec default, adjustable to 1024 sec Radiation Source500 mCi AmBe (18.5 GBq) Source Decay EffectsNegligible. 432-year half-life Surface RadiationLess than 5 mRem/hr (50 µSv/hr), measured at 300 mm (1 ft) from the surface of the source head Sealed Source and Device RegistryMeets General License Device requirements (US) Operating Temperature-40°C to +80°C (-40°F to +176°F) CSA; -20°C to +70°C (-4°F to +158°F) ATEX Power Requirements±15 VDC for the detector; 110 to 240 VAC or 24 VDC for the 1400S transmitter Materials of ConstructionDetector and source head: 316 Stainless Steel Precision±0.2% (results on 2-in steel wall hopper) or better, depending on applicationApprovalsCSA (C, US) approved for use in Class I, Div 1, Groups B, C, D; Class I, Div 2, Groups A, B, C, D; Class II, Div 1, Groups E, F, G; Class III; Temp Code: T6; Encl. type 4X; Ta: -40°Cto +80°C (-40°F to +176°F) ATEX approved for use in II 2 G IIC T3-T6; (T6: Tamb -20°C to +40°C); (T4: Tamb -20°C to +55°C); (T3: Tamb -20°C to +70°C) Transmitter Specifications System ArchitectureMultiprocessor based electronics means uninterrupted output during data entry and system interrogation; All user data doubly stored in non-volatile memory with no battery backup required DisplayFour-line backlit display; displays up to eight readouts simultaneously Current Outputs4 to 20 mA isolated self-powered or loop-powered into 800 ohms, field scalableOne (1) current output standard Up to three current outputs available, each representing independent span channels Serial OutputsRS485 half duplex; RS232 full duplex Contact Closure OutputsUp to 16-115 VAC/28 VDC SPDT @ 10 amps (230 VAC SPDT @ 8 A) InputsUp to three additional I/O available; dry contact closure Programming OptionsMenu-driven direct keypad entry MountingTransmitter can be mounted up to 2500 ft (762 m) from the detector PowerAC Version: 100-240 VAC 50/60 Hz; Power = 17.2 W DC Version: 20-28 VDC; Power = 12 WApprovalsNEMA 4X/IP65ATEX: II 3 G Ex nA IIC T6 (-40°C
Commissioning included with the purchase of a detector. Contact Thermo Fisher Scientific concerning the disposal of sources from existing detectors . ©2009 Thermo Fisher Scientific Inc. All rights reserved. All trademarks are the property of Thermo Fisher Scientific Inc. and its subsidiaries. Results may vary under different operating conditions.Specifications, terms and pricing are subject to change. Not all products are available in all countries. Please consult your local sales representative for details. Literature Code PI.2038.0409 Process Instruments www.thermo.comUnit 702-715, 7/F Tower WestYonghe Plaza No. 28, Andingmen East Street Beijing 100007 CHINAA-101, ICCTrade Tower, Senapati Bapat RoadPune 411016 Maharashtra INDIAIon Path, Road Three, Winsford, Cheshire CW7 3GA UK1410 Gillingham LaneSugar Land, TX 77478 USA +86 (10) 8419-3588+86 (10) 8419-3580 fax+91 (20) 6626 7000+91 (20) 6626 7001 fax+44 (0) 1606 548700+44 (0) 1606 548711 fax+1 (800) 437-7979+1 (713) 272-0404 +1 (713) 272-4573 fax