SERIES G14

REFLEX & TRANSPARENT FLAT GAUGE GLASS
FOR ARMOURED GAUGES

Reflex Borosilicate
Style 545 - Reflex
Borosilicate
Style 546/547 Transparent Borosilicate
Style 546/547
Transparent
Borosilicate
  • Maxos® Brand
  • SCHOTT USA Specification

Maxos Flat Gauge Glass is manufactured from a special formulated borosilicate glass, characterized by low coefficient of expansion, high chemical durability, and exceptional homogeneity.

Style 545 – Reflex Borosilicate
1 required per each gauge section

Style 546 – Transparent Borosilicate
2 required per each gauge section

Style 547 – High Pressure Transparent Borosilicate
2 required per each gauge section

Gaskets and shields available for all glass sizes
 

Application Notes

  • Steam Service: Requires Mica protection for transparent glass in gauges rated for steam applications
  • Vacuum Service: Acceptable with properly designed equipment
  • Compatibility: Before ordering, verify that the glass is compatible with the design, media(s), cleaning solutions, and the environment of the application and future applications. Ernst instruments does not make compatibility recommendations. Compatibility determinations, corrosion or otherwise, are the responsibility of the user.

Some medias reduce the useful life of gauge glass by chemical action, such as Hydrofluoric Acid (HF), hot concentrated Phosphoric Acid (H3PO4), Sodium Hydroxide (NaOH) and Potassium Hydroxide (KOH) above 125°F, steam or superheated water above 250°F. Alkaline solutions attach glass very slowly at room temperatures, but as temperature is increased over 100°F, the corrosion rate rises rapidly. Steam can etch or erode glass thus weaken the glass.

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

Ratings

StyleGlass SizeLength
Inches		Length
mm		     Type     Pressure and Temperature Ratings
Saturated steam or
hot water in direct
contact with glass
(no mica shield)		Saturated steam or
hot water in contact
with glass protected
with mica		Non-corrosive,
non-steam service
and no technically
significant glass attack
REFLEX
545-1
545-2
545-3
545-4
545-5
545-6
545-7
545-8
545-9
 
1
2
3
4
5
6
7
8
9
 
4-1/2
5-1/2
6-1/2
7-1/2
8-5/8
9-7/8
11
12-5/8
13-3/8
 
115
140
165
190
220
250
280
320
340
 
B1
B2
B3
B4
B5
B6
B7
B8
B9
500 PSIG @ 470°FMica Not used
with Reflex Glass		4000 PSIG @ 100°F
TRANSP.
546-1
546-2
546-3
546-4
546-5
546-6
546-7
546-8
546-9
 
1
2
3
4
5
6
7
8
9
 
4-1/2
5-1/2
6-1/2
7-1/2
8-5/8
9-7/8
11
12-5/8
13-3/8
 
115
140
165
190
220
250
280
320
340
 
A1
A2
A3
A4
A5
A6
A7
A8
A9
500 PSIG @ 470°F

1500 PSIG @ 597°F,

Max. 608°F		5000 PSIG @ 100°F
HP TRANSP.
547-1
547-2
547-3
547-4
547-5
547-6
547-7
547-8
547-9
 
1
2
3
4
5
6
7
8
9
 
4-1/2
5-1/2
6-1/2
7-1/2
8-5/8
9-7/8
11
12-5/8
13-3/8
 
115
140
165
190
220
250
280
320
340
 
A1-HP
A2-HP
A3-HP
A4-HP
A5-HP
A6-HP
A7-HP
A8-HP
A9-HP
500 PSIG @ 470°F1500 PSIG,

Max. 608°F		Up to 6000 PSIG @ 100°F

(In high pressure gauges)

Specifications

Dimensional Tolerances

DimensionsTolerances
LengthSee above+0”, -0.039” (+0mm, -1.5mm)
Width1.339” (34mm)+0.008”, -0.039” (+0.2mm, -0.8mm)
Thickness0.689” (17.5mm)+0”, -0.028” (+0mm, -1.0mm)
Flatness (max)Sizes 1-3≤ 0.002”, ≤ 0.05mm
Flatness (max)Sizes 4-5≤ 0.003”, ≤ 0.08mm
Flatness (max)Sizes 6-9≤ 0.005”, ≤ 0.13mm
Flatness (max)All High Pressure≤ 0.002”, ≤ 0.05mm

Temperature

Thermal shock resistanceΔ T 446°F (230°C)
Max. permissible temperature572°F (300°C)
Max. permissible temperature with mica608°F (320°C)

 
Model Number Matrix
Model Number Matrix