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Process Indicators

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7750 Series Pneumatic Column Indicator

  • Visually displays tank level
  • Used with bubblers or pneumatic tank sensors that produce a pressure output signal, provides local or remote tank level indication
  • Uses the Hydrostatic Manometer Principle to provide high accuracy
  • Custom calibrated scale permits direct reading in units of volume, weight or depth.
  • All pneumatic operation eliminates any need for additional intrinsic safety provisions
  • Easy maintenance, proven long-term dependability

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ORDERING INFORMATION

SERIES 7750S Pneumatic Column Indicator

SCALES

20 Stainless Steel case, 20" scale, 1 unit 43 Stainless Steel case, 43” scale, 1 unit
35 Stainless Steel case, 35” scale, 1 unit 23 Stainless Steel case, 51” scale, 1 unit
LIQUID* R Red liquid    
FITTINGS 1 None, 1/4" NPT 4 Swagelok 1/4” tube (compatible with Copper or Polyflo tubing)
3 Polyflo 1/4" tube    

* Red Liquid 2.94 sp. gr.; scale factor = 0.337
NOTE: Scale information must be supplied when order is placed. Package includes overflow check valve and Swagelok fitting (1/4” tube × 1/4 NPT) compatible with copper or poly tubing.

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SPECIFICATIONS

Operation principle Well-type manometer acts as a frictionless hydrostatic force-balance. A liquid fill is raised in direct proportion to the magnitude of pressure applied. (Varies based on type of indicating liquid employed)
Resolution Infinite based on type of indicating liquid employed.
Input connection(s) 1/4” NPT tapped connection for typical tube fittings. Accepts pneumatic air/gas pressure input; high and low pressure inputs.
Materials of construction Formed channel indicator housing; brushed Stainless Steel (Type 304). Heavy plate glass window; acrylic plastic window available as special order.
Wetted parts 316 Stainless Steel liquid well and tubing
Indicating tube High strength, fully annealed glass (Pryex®)
KING-GAGE indicator Single display tube, available in wall mount housing only
Scale Ranges: 20", 35", 43", 51", 66", 81"
KING-GAGE multi-tube indicator Multiple display tubes; 2-, 4-, 6-, 8-, 10-tube configurations. Tubes are spaced on 2-5/16" centerlines. Available in either wall mount or flush panel mount housing with front bezel assembly.
Scale ranges: 20", 30", 40", 50", 60", 80"
Overflow check valve Included as standard with all indicator packages

* Unregulated
** Pyrex® is a registered trademark of Corning, Inc.

Options & Accessories

8838            Overflow check valve 1/4" NPT gauge connection
7461-2         Overflow return reservoir

4530-1-1-*    SafeGard range 25"–650" water pressure
4530-1-2-*    SafeGard range 650"–1750" water pressure

* = 
1 - none, 1/4” NPT
3 - Polyflo 1/4" tube
4 - Swagelok 1/4" tube x 1/8" NPT (compatible with Copper or Polyflo tubing)

5181-1     Glass Tube Packing Seal Kit 

    •    Nut, qty. 2
    •    Washer, qty. 2
    •    O-Rings, qty. 4

NOTE: This kit is part of Glass Tube Replacement Kit, p/n 5159-xx.
 

2992-8      Red Liquid No. 294, 8 fl oz.
2992-16    Red Liquid No. 294, 16 fl oz.
 

7083-20    Left & right side pair, 20” scale, 1-unit
7083-35    Left & right side pair, 35” scale, 1-unit
7083-43    Left & right side pair, 43” scale, 1-unit
7083-51    Left & right side pair, 51” scale, 1-unit
7083-66    Left & right side pair, 66” scale, 1-unit
7084-20    Left & right side pair, 20” scale, 2-units
7084-35    Left & right side pair, 35” scale, 2-units
7084-43    Left & right side pair, 43” scale, 2-units
7084-51    Left & right side pair, 51” scale, 2-units
7084-66    Left & right side pair, 66” scale, 2-units
 

5159-20    Glass tube replacement kit, 20"
5159-35    Glass tube replacement kit, 35"
5159-43    Glass tube replacement kit, 43"
5159-51    Glass tube replacement kit, 51"
5159-66    Glass tube replacement kit, 66"
5181-1      Tube packing seal kit
7560          Drain plug 
8806          Drain plug washer
7761-**      Reflector (consult factory)
 

1-1/2" NPT Tank Top Fitting (for 3/4” Pipe) single purge line connection with tube fitting
7746-13    Carbon Steel, polyflo 3/8" tube
7746-15    Carbon Steel, Swagelok 3/8" tube
7746-18    316 Stainless Steel, Swagelok 3/8" tube

1-1/2" NPT Tank Top Fitting (for 3/4" Pipe) with single 1/4" NPT purge port connection
2000FA    Carbon Steel
2000PA    PVC    
2000SG    316 Stainless Steel

1-1/2" NPT Tank Top Fitting (for 3/4" Pipe) with two 1/4" NPT purge/equalizer connection
2000FA-2   Carbon Steel
2000PA-2   PVC
2000SG-2  316 Stainless Steel

WARNING: This product can expose you to chemicals including Lead and Nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov