54 Engineering Practice Improving Mathematical Model Development This article provides practical guidance for engineers and highlights the importance of combining mathematical skills, domain expertise and proper communications Equipment and Services 19 Focus on Gas Detection Handheld camera detects fugitive vapor leaks; This device monitors emissions at landfills; WirelessHART gas-detection device adds capabilities; This sensor provides rapid detection of toxic gases; Infrared line-of-sight detector monitors combustible gases; Minimize worker exposure during field surveys of VOCs; and more 19 22 New Products New control system for multi-burner applications; Gently feed free-flowing granular media; Custom sealing applications for hygienic applications; This wearable camera includes thermal-imaging analysis; Chemical metering pumps for remote and mobile applications; and more 22 59 Show Preview Valve World Americas 2019 The Valve World Exposition and Conference will take place in Houston on June 19-20. Here is a small sample of the products being displayed there Departments 59 5 Editor's Page The 2019 Kirkpatrick Award The finalists are announced for the 2019 Kirkpatrick Chemical Engineering Achievement Award 72 Economic Indicators Advertisers 61 Solids Processing Special Advertising Section 68 Hot Products 69 Classified 70 Subscription and Sales Representative Information 71 Ad Index Chemical Connections Follow @ChemEngMag on Twitter Join the Chemical Engineering Magazine LinkedIn Group Visit us on www.chemengonline.com for more articles, Latest News, Webinars, Test your Knowledge Quizzes, Bookshelf and more Coming in July Look for: Feature Reports on Packaging and Handling of Hazardous Materials; and the Technical Workforce; A Focus on Pumps; A Facts at your Fingertips on Catalysts; News Articles on Reforming; and Temperature Measurement and Control; New Products; and much more Cover design: Rob Hudgins 2 CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM JUNE 2019http://www.chemengonline.com http://WWW.CHEMENGONLINE.COM