User Manual
TABLE OF CONTENTS
Safety Rules ............................................................................... 2
Features ...................................................................................... 3
Operating Instructions ............................................................. 4
EM151/EM201 Specifications  ................................................ 6
Pressure Conversion Chart ..................................................... 7
Warranty..................................................................................... 8
INTRODUCTION
The EM151 and EM201 provide a simple, time-
saving alternative to U-tube pressure measurements.  
Use the UEi EM151 & EM201 to measure gas supply 
and draft pressures in residential or light commercial 
properties. The EM201 differential mode provides a 
convenient method to measure pressure drops. 










