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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 with Valves

Northeast Controls Models RH and TH are high pressure armored level gages engineered for demanding applications requiring elevated pressure ratings while maintaining accurate liquid level indication. Manufactured from solid bar stock with forged covers and precision-machined chambers, these gauges provide dependable service in high-pressure process systems.

Available in both single and multiple section types 1 through 9 with a one-piece liquid chamber. 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.

REFLEX GAUGES (Model RH) — Equipped with flat reflex glass comprising reflecting prisms that cause the liquid inside to appear black. The vapor space above appears silvery in direct contrast, assuring a distinct reading of the liquid level. No external illuminator required.

TRANSPARENT GAUGES (Model TH) — Equipped with two flat plain glass sections, one on either side of the liquid chamber, allowing light to pass through for clear observation of liquid level, color, interface layers, and product clarity. Plastic or MICA shields can be furnished for caustic or acid service. Supports external illuminators.

CONNECTION STYLES — Available with end, side, or back connections in 1/2" and 3/4" NPT. Offset close hook-up, union end connected, and standard close hook-up configurations also available.

OPTIONAL CONFIGURATIONS — Frost Proof models available for temperatures as low as -325°F (all stainless steel construction below -150°F). Heated/cooled models available for viscous liquids. Large chamber models (RHC/THC) available for surging or boiling liquids.

Key Features

  • High pressure design — up to 4000 PSI at 100°F
  • One-piece chamber construction
  • Forged steel covers with heavy-duty bolting
  • Excellent resistance to thermal shock
  • Stainless steel and alloy options available
  • Single and multiple section designs (1 through 9)

Ideal For

  • Refineries and power generation
  • Chemical plants and reactors
  • High-pressure vessels and separators
  • Petrochemical facilities
  • Boilers and steam systems
  • Process separators

Specifications

Chamber Material:
Carbon Steel, 304SS, 316SS; Monel and other alloys available
Cover:
Drop Forged Steel
Window:
Tempered Borosilicate Glass
Gasket Material:
Compressed Non-Asbestos (standard); Teflon Lo-Flo available
Connections:
1/2" or 3/4" NPT Female; end, side, or back
Sections:
1 through 9 sections (single or multiple)
Options:
Frost Proof (to -325°F), Heated/Cooled, Large Chamber, Illuminators, Measuring Scales

Model RH (Reflex Style) Pressure & Temperature Ratings (PSI)

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

Model TH (Transparent Style) Pressure & Temperature Ratings (PSI)

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

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Contact Us

Northeast Controls Inc.
PO Box 9, Nassau, DE 19969 USA

1+201.419.6111[email protected]

8:30am – 4:30pm EST | Mon – Fri