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The US Gauge 656 4" (100mm) Low Back Mount Liquid Filled Pressure Gauge – PSI (6566-LBM-PSI) is ideal for corrosive environments in chemical, petrochemical, refining, power, marine, and food and pharmaceutical processing applications. They are suited for using on equipment where extreme vibration and pulsation are present, such as pumps, compressors, machine tools, etc. The liquid fill lessens the effect of these harsh environments, shields the gauge internally, and provides continuous lubrication on the mechanism, all making for a lengthier service life.
The NEMA 4X / IP67 compliant design makes the gauge more durable, while the liquid filling also provides protection from corrosive atmospheres. AMETEK liquid filled gauges can be used with a variety of fill fluids including glycerin, mineral oil, and silicone oil making it ideal for an expanse of applications.
| Sizes | 2-1/2" (63mm), 4" (100mm), and 6" (160mm) |
| Ranges | 63mm – 30" Hg-0 psi through 0 to 10000 psi (0 psi to 6000 psi on the lower back mount model) 100mm and 160mm – 30" Hg-0 psi through 0 psi to 23000 psi |
| Accuracy | Model 6562 (63mm) – ±1.6% of full scale (Grade B) Model 6566 (100mm) and 6568 (160mm) – ±1.0% of full scale (Grade 1A) |
| Bourdon Tube | Seamless 316L stainless steel Model 6562 (63mm) – Less than or equal to 800 psi, C type Bourdon tube; greater than or equal to 1000 psi, helical type Bourdon tube Model 6566 (100mm) and 6560 (160mm) – Less than or equal to 1000 psi, C type Bourdon tube; greater than or equal to 1500 psi, helical type Bourdon tube |
| Window | 63mm – Polycarbonate (laminated shatter-resistant glass window optional) 100mm and 160mm – Laminated shatter-resistant glass window |
| Movement | 304 stainless steel |
| Dial | White aluminum with black lettering* |
| Pointer | 63mm aluminum alloy, black painted; adjustable pointer on 100mm and 160mm, aluminum black |
| Case and Bezel Ring | 304 stainless steel, bayonet type |
| Case Pressure Relief | Top – Rubber disc for 63mm; Back – Rubber disc for 100mm |
| Process Connection | 316L stainless steel 63mm – 1/4–18 NPT standard 100mm – Lower mount 1/4–18 NPT or 1/2–14 NPT standard; Lower back mount 1/4–18 NPT standard 160mm – Lower mount 1/2–14 NPT standard |
| Working Pressure | Steady – 50% of full scale; Over range protection – 125% of full scale |
| Working Temperature | Ambient: -40°F to 140°F (-40°C to 60°C) Fluid: -4°F to 176°F (-20°C to 80°C) |
| Weather Protection | NEMA 4X/IP67 |
* Single scale psi dials are standard, but dials can be changed out at the factory for kPa/psi, kPa, psi/bar, or bar
Connection Size & Pressure Ranges
| 356050 | 1/4" NPT 0-30" HG |
| 356051 | 1/4" NPT 30"-0-15 PSI |
| 356052 | 1/4" NPT 30"-0-30 PSI |
| 356053 | 1/4" NPT 30"-0-60 PSI |
| 356054 | 1/4" NPT 30"-0-100 PSI |
| 356055 | 1/4" NPT 30"-0-150 PSI |
| 356057 | 1/4" NPT 0-15 PSI |
| 356058 | 1/4" NPT 0-30 PSI |
| 356059 | 1/4" NPT 0-60 PSI |
| 356060 | 1/4" NPT 0-100 PSI |
| 356061 | 1/4" NPT 0-160 PSI |
| 356062 | 1/4" NPT 0-200 PSI |
| 356063 | 1/4" NPT 0-300 PSI |
| 356064 | 1/4" NPT 0-400 PSI |
| 356065 | 1/4" NPT 0-600 PSI |
| 356066 | 1/4" NPT 0-800 PSI |
| 356067 | 1/4" NPT 0-1000 PSI |
| 356068 | 1/4" NPT 0-1500 PSI |
| 356069 | 1/4" NPT 0-2000 PSI |
| 356070 | 1/4" NPT 0-3000 PSI |
| 356071 | 1/4" NPT 0-6000 PSI |
| 356072 | 1/4" NPT 0-10000 PSI |
| 356073 | 1/4" NPT 0-14500 PSI |
| 356074 | 1/4" NPT 0-23000 PSI |
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