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The Thermo ScientificTM RM 310 EH demonstrates excellence in non-contact, online coating weight measurement. The RM 310 EH gauging system provides the user with reliable, proven sensor technology mounted in the ideal location for the shortest feedback time for air knife positioning and pressure control.

The measuring units of the gauges areinstalled at the hot location of the hot dipgalvanizing line, directly above the air knives.This gauge configuration is especiallyadvantageous for autocontrol systemsbecause the dead time between the actuatorand measurement is kept to a minimum.

The RM 310 EH hot measuring heads use X-ray sources for coating weight measurement of both the top and bottom side of the strip. These sources provide fast response times with all the specific advantages of X-ray generation. The photons from the X-ray source cause X-ray Fluorescence (XRF) radiation to be generated in the coated strip. The fluorescence radiation is detected by application specific detectors mounted within the measuring unit.

The RM 310 EH measuring heads areinstalled in water-cooled detector housingscontaining additional sensors for monitoringthe distance to the strip and the air andsensor temperature.

The distance between the measuringhead and strip is continuously measuredto follow the strip movement by a distancecontrol loop with tracking mechanism.The influence of high frequency distancevariations due to strip flutter is compensatedby software.

The measuring heads are mountedon detector supports that can be drivenindependently to the measuring or calibrationposition. The detector supports are installedon a moveable base carrier for driving to themeasuring position and to the maintenanceposition beyond the strip zone.

This Thermo Scientific gaugesignificantly improves coating weightcontrol by reducing the dead time betweenthe actuator and measurement, resultingin raw material savings and a reductionin scrap. We are the world’s first supplierof hot coating weight gauges for hot dip galvanizing lines.

Features•  Very short feedback times

for coating weight autocontrol (Adaptive Autocontrol)

•  Measuring units for up to 100°C (373°K)ambient temperature, mounted directly above the zinc pot

•  Proven technology to consider pass line change and strip flutter

•  Robust mechanics, installation assistance by experienced engineers

•  More than 30 years experience with this application

•  User-friendly operator interface

Applications:•  Galvanized steel (Zn) •  Galvalume steel (Zn/Al)•  Binary coatings (Zn/Ni) •  Aluminized steel (Al)•  Tin coated steel (Sn)•  Terne coatings (Pb/Sn)•  Other metallic coatings on steel

Thermo Scientific RM 310 EH Hot Metal Coating Weight Gauge

Thermo Fisher Scientific,Erlangen, Germany is ISO Certified.

Visit www.thermoscientific.com/metals or email us at: sales.gauging@thermofisher.com © 2014 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 contact your local sales representative for details.

CAD.2942.PS.0714

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Entry ThicknessGauges

Thermo ScientificRM 100 PL

(Gamma-ray)or

Thermo ScientificRM 110 PL

(X-ray)or

Thermo ScientificRM 200 PL

(Gamma-ray)

Hot GaugeThermo ScientificRM 310 EH (X-ray)

Exit ThicknessGauges

Thermo ScientificRM 100 PL

(Gamma-ray)or

Thermo ScientificRM 110 PL

(X-ray)or

Thermo ScientificRM 200 PL

(Gamma-ray)

Coating Weight AutocontrolThermo Scientific RM 400 EZ

Cold GaugesThermo ScientificRM 310 EC (X-ray)for Zinc Coating

orThermo ScientificRM 315 EC (X-ray)for Zinc Coating

and Galvannealing

Oven (if existing)

Zinc Pot

Air Knife

RM 300 EH and RM 310 EH – Hot Metal Coating Weight GaugesGeneral Specifications - RM 310 EH

Measuring range 30 to 250 g/m2 Zn per side

Sources 2 x X-ray, typically 12 kV

Detectors Ionization chambers

Strip width Typically up to 2,000 mm (78.7 in)

Number of measuring heads Two in total (for top and bottom side of the strip)

Permissible ambient temp. Up to 100°C (212°F) for measuring heads

Measuring gap Approximately 25 mm (0.98 in)

Motion modes Fixed position mode (length profile measurement) Maintenance position mode (off-sheet)

Schematic View of a Hot Dip Galvanizing Line withPositions for Thickness and Coating Weight Gauges

Configuration of GaugesThe RM 310 EH hot coatingweight gauge can be connected with ascanning coating weight gauge at the coldend of the galvanizing line:

• RM 310 EC or• RM 315 EC

Additionally, an adaptive autocontrol system, the RM 400 EZ, for coating weightautocontrol, can be integrated into the system.For thickness measurement of the strip atthe entry or exit side of the galvanizing line,the RM 100 PL, RM 110 PL and RM 200 PL gauges are available. These units offereither X-ray or Gamma-ray sources.

USA 200 Research Drive Wilmington, MA 01887 +1 978 663 2300

Japan 3-9C Building, Moriya-cho Kamagwa-Ku, Yokohama 221-022 +81 45 453 9188

Germany Frauenauracher Str. 96 91056 Erlangen +49 (0) 9131 998 0

India 101/102 Pride Portal Shivaji Housing Society Village Bhamburda, Pune 411016 +91 20 6626 7000

Brazil AI. Ministro Rocha Azevado No. 38 01410-0000 São Paulo (SP) +55 11 2367 2192

Korea Kookmin 1st Bldg. 6th Fl, 1009-5, Daechi-Dong, Gangnam-Gu, Seoul, 135-851+86 (0) 21 6865 4588

China Building 6, No. 27 Xin Jinqiao Pudong, Shanghai 210206 +86 (0) 21 6865 4588

Australia 18 Butler Boulevard Burbridge Business Park Adelaide, 5950 +61 (08) 8208 8200