Adarsh Ammonia Gauges are specially designed to sustain against vibration, sudden pressure and temperature conditions. Ammonia gauge are used to measure suction and discharge pressure on Ammonia compressors. 
Specifications
4 Availalble in dial sizes 2-1/2", 4" 
4 Complete Stainless Steel Construction
4 Dry or Liquid Filled (Glycerin or Silicon)
4 Any standard thread connection
4 Bottom or Back Mounted
Download Datasheets                                       Series
63mm (2-1/2") Dial Size SS Ammonia Gauge........................AM102
100mm (4") Low Cost Model SS Ammonia Gauge.................AM30X
100mm (4") Heavy Duty Model SS Ammonia Gauge..............AM40X
Options Available
4 Custom Designed Dials
4 Accessories: Pulsation Dampner, Gauge Cocks, Gauge Savers
Pressure Range Selection
All Pressure Scales are with corresponding temperature readings
psi scale                     bar scale           kg/cm2 scale  
-30x150 psi                -1x9 bar            -760mmhg x 16 kg/cm2
-30x300 psi                -1x12 bar          -760mmhg x 25 kg/cm2
                                   -1x15 bar
                                   -1x25 bar
How to Inquire:
Send you inquiry with details like :
4Dial size - 2-1/2" or 4"
4Pressure range - select range from above
4Thread connection - 1/4" npt or 3/8" or 1/2" bsp/npt
4Mounting: bottom or back 
4Filling: dry or liquid (glcyerin or silicon) filled
or any other special requirements you have.