RANGE
 The maximum operating pressure should not 
exceed 75% of the full-scale range. The normal 
operating range should be in the middle half of 
the range (between 25% and 75% of the full
scale range); whenever possible.
 DIAL SIZE
 Select a dial size that allows you to comfortably 
read the dial from the normal distance when 
installed.
 PRESSURE SYSTEM MATERIAL
 The media to which the gauge will be subjected 
is critical to the selection of the proper material 
for the Bourdon tube, bellows, and socket. 
Weksler models are offered with:
 Phosphor bronze Bourdon tube (or bellows) 
with brass sockets.
 Pressure Gauge Selection
 316 stainless steel Bourdon tube (or 
bellows) with 316 stainless steel sockets.
 316 stainless steel Bourdon tube with alloy 
steel sockets.
 Monel Bourdon tubes with Monel sockets.
 For applications where the above materials 
may not be suitable, a diaphragm seal will 
be necessary to protect the pressure gauge 
system.
 ACCURACY
 Select a gauge with the desired accuracy as 
follows:
 ±¼%  –   Test gauges only (not for in-line  
service)
 ±½%  –   Weksler Royal gauges (41/2˝ dial 
size and larger) and Weksler digital 
gauges (21/2˝ case size)
   ±1%  –   Weksler Regal gauges, 100 MM 
Gauge, EA14 gauge
 ±2-1-2% –   Weksler duplex, differential and low 
pressure gauges
 ±3-2-3%  –   Weksler BY12, BY42, UA15, UA20, 
UA25, UA35 series utility gauges
 MOVEMENT
 Select either a gauge with 300 series stainless 
steel movement for long wear  or a gauge with 
bronze or brass movement for applications 
where vibration and pulsation are not present.
 CASE
 A wide variety of case styles and materials 
are offered. Determine how the gauge is to 
be mounted: direct, surface (wall) or flush (in 
panel). Determine the desired case materials: 
polyproylene (or phenol); aluminum (black 
enameled) or stainless steel (300 series).
 Determine case type:  
Safety  
   (solid front with blow-out back)
 Standard  
   (open front with rubber blow-out disc at rear)
 Note –  All safety case styles are designated 
by a number. Standard case styles are 
designated by a letter.
 WINDOW
 A glass face is standard in most gauges. If 
breakage is a concern, a plastic or shatterproof 
glass face is optional at extra cost on most 
Weksler Royal and Regal gauges. (Glycerin 
filled and sanitary gauges have plastic face as 
standard).
 POINTER
 All Weksler gauges (except utility types) have 
adjustable pointers. This permits pointer repo
sitioning during calibration check or allows 
maximum precision at a specific point.
 TEMPERATURE
 The ambient temperature to which the gauge 
will be subjected should not exceed 150°F. If 
higher temperatures are encountered the gauge 
must be isolated from the source of heat. The 
temperature of the media to which the gauge 
is subjected to is also critical. Gauges with 
phosphor bronze Bourdon tubes should not be 
subjected to process temperatures in excess 
of 150°F. Gauges with metal cases and either 
316 stainless steel or monel bourdons can 
withstand higher process temperatures, but 
as temperature exceeds 150°F hardening of 
the gasketing and discoloration of the dial may 
occur. In addition, accuracy will be affected 
by approximately 1.5% per 100°F. Both 316 
stainless steel and monel gauges in metal cases 
will withstand 750°F for short periods of time 
without rupture, but other parts of the gauge 
will be destroyed and calibration will be lost.
 VIBRATION
 If present, a glycerin filled gauge is 
recommended.
 PULSATION
 If present, a pressure snubber or throttle screw 
is recommended