Model RH and TH High Pressure Level Gages

Model RH and TH High Pressure Level Gages

Reflex and Transparent Flat Glass Gages – Pressures Up To 4000 PSI @ 100° F / 2775 PSI @ 600° F

Transparent Level Gage
Transparent Gage w/ Valves

Models RH and TH are high pressure gauges and are available in both single and multiple section types 1 through 9 with a one-piece liquid chamber. They are machined from solid bar stock of
cold rolled carbon steel, stress relieved and assembled complete with drop forged steel covers, tempered borosilicate glass, gaskets, bolts and nuts, making the gauges resistant to thermal shock, heat, corrosion and abrasion.

The liquid chamber is recessed to hold each individual gauge glass and gasket snugly, eliminating any possible movement by internal pressure.

All bolts are properly spaced to ensure uniform pressure on the glass and gaskets, and are manufactured from ASTM grade steel. The gaskets used are of the finest quality, uniform in thickness and accurately die-cut. Our standard gasket material is compressed non-asbestos, but can be interchanged with alternate material depending on the liquid being used.

REFLEX GAUGES – This gauge type is equipped with flat reflex glass comprised of reflecting prisms which cause the liquid inside to appear black in color. The space above appears silvery in direct contrast assuring a distinct reading of the liquid level.

TRANSPARENT GAUGES – This gauge type is equipped with two flat plain glass sections; one on either side of the liquid chamber. This allows light to pass through the gauge permitting clear observation of liquid level, color and clarity. Plastic or MICA shields can be furnished when handling caustic substances, acids or media corrosive to glass.

Connection styles available: 1/2″ or 3/4″ NPT Female with end, side or back connections.

Construction Materials:

  • Chamber: Carbon Steel, 304SS and 316SS
  • Gasket Material: Teflon Lo-Flo, Non-Asbestos Compressed Fiber
  • Window: Tempered Borosilicate Glass
  • Options: Non-Frost Extension, Illuminators, Side Connections

Gauges are also available in Stainless Steel, Monel, or other alloys.

NCI does not recommend low pressure gauges for steam applications.

Temperature and Pressure Ratings:


Reflex Style Ratings

Model RH (reflex style) Pressure & Temperature Ratings
Size100°F200°F300°F400°F500°F600°F
1 x 1400038003600335031002775
1 x 2385037003500320029502650
1 x 3370035003300310028502550
1 x 4360034003250300027502450
1 x 5345033003100290026502400
1 x 6330031503000280025502300
1 x 7320030502900270024502200
1 x 8310029502800255023502100
1 x 9300028002650245022502000


Transparent Style Ratings

Model TH (transparent style) Pressure & Temperature Ratings
Size100°F200°F300°F400°F500°F600°F
1 x 1300028502750255023002000
1 x 2285027002550240022001900
1 x 3270025502400230021001800
1 x 4255024502300220019501750
1 x 5245023002200210018501700
1 x 6240022502100200018001600
1 x 7220021001950185017001500
1 x 8205019501800170016001400
1 x 9200019001750165015001300


Dimensional Details:


Dimensional Details

SectionsGlass SizeVisible GlassEnd Connected OAL
InchesMMInchesMM
113.75955.25133
124.751216.625159
135.751467.25184
146.751718.25210
157.8752009.375238
169.12523210.625270
1710.2526011.75298
1811.87530213.375340
1912.62532114.125359
2415.0038116.5419
2517.2543818.75476
2619.7550221.25540
2722.0055923.5597
2825.264126.75679
2926.7567928.25718
3630.37577231.875810
3733.7585735.25895
3838.62598140.1251019
3940.875103842.3751076
4745.5115647.01194
4852.00132153.501359
4955.00139756.51435
5757.25145458.751492
5863.375166166.8751699
5969.125175670.6251794
6878.75200080.252038
6983.25211584.752153
7892.125234093.6252378
7997.375247398.8752511
88105.52680107.002718
89111.502832113.002870
98118.8753019120.3753058
99125.6253191127.1253229
108132.253359133.753397
109139.753550141.253588