level gauge glass

FOB Reference Price:Get Latest Price
$2.70 - $25.50 / Piece | 50 Piece/Pieces (Min. Order)
Lead Time:
Quantity(Pieces) 1 - 100 >100
Est. Time(days) 7 Negotiable
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Quick Details
Place of Origin:
Hebei, China
Brand Name:
Bright pearl
Model Number:
Reflex,Plain,A1-A9 / B1-B9
reflex, plain
Tempered Glass
Toughened Glass
Working pressure:
Special size:
Working temperature:
260 °C
Supply Ability
Supply Ability:
1000 Piece/Pieces per Month
Packaging & Delivery
Packaging Details
50 or 100pcs each paper carton, then in wooden case
Lead Time :
Quantity(Pieces) 1 - 100 >100
Est. Time(days) 7 To be negotiated

Reflex glass is made from Borosilicate; it is used in lever gauge in boiler for water position.

 It is also named:  Reflex Gauge Glass, Sight glass, Reflex Glasses

Reflex sight glass, Spares For level Gauge

The category is as follows:

 1) Three tendons (four grooves)

 2) Two tendons (three grooves)

 3) Plan transparent


Three tendons (four grooves)
340 x 34(30) x 17mm 320 x 34(30) x 17mm,
280 x 34(30) x 17mm
250 x 34(30) x 17mm, 218 x 34(30) x 17mm,
190 x 34(30) x 17mm
165 x 34(30) x 17mm, 140 x 34(30) x 17mm,
115 x 34(30) x 17mm
400 x 34 x 17mm,370 x 34 x 17mm
300 x 34 x 17mm

400x 34x 17mm   370x 34 x 17mm    300 x 34 x 17mm
The other size is optional or according to the requirements of customers.
Working temperature: 260 °C, Working pressure: 4.0MPa


Two tendons (three grooves)
340 x 34 x 17mm 320 x 34 x 17mm, 280 x 34 x 17mm
250 x 34 x 17mm, 218 x 34 x 17mm, 190 x 34 x 17mm
165 x 34 x 17mm, 140 x 34x 17mm, 115 x 34 x 17mm
280×34×22mm, 280×28×17mm, 250×34×20mm, 250×34×22mm,
The other size is optional or according to the requirements of customers.
Working temperature: 260 °C, Working pressure: 4.4MPa


Transparent plane


340 x 34 x 17mm,   320 x 34 x 17mm,   280 x 34 x 17mm

250 x 34 x 17mm,   218 x 34 x 17mm,   216 x 34 x 17mm

190 x 34 x 17mm,   165 x 34 x 17mm,   215 x 34 x 22mm

218 x 38 x 23mm,   190 x 38 x 23mm,   165 x 38 x 23mm

The other size is optional or according to the requirements of customers.

Working temperature: 260 , Working pressure: 8.0 MPa


The material:Borosilicate Glass


Level Gauge Glass Physical Property

Testing ItemStandard Rules

1. Appearance

1) Air bubble:
Diameter≤0.5mm,in the 10mm x 10mm area the quantity must be ≤3.
Diameter from 0.5mm to 1.5mm dispersive air bubble,there is less 2 on the sight plane and less 5 on the No-sight plane. Their distance must be >40mm.
The air bubble of Diameter from 1.5mm to 2mm ≤3  on the No-sight plane. Their distance must >40mm.
On the sight plane, The distance to the side in 7.5mm,the air bubble of the  diameter2) The glass don’t allow slag and scrap iron,etc. impurity.
3) Stripe : don’t allow have palpable filaceous and pectinate stripe on the sight plane.
4) Cockle: In the side face,don’t allow have the cockle of depth >1mm.
5) Crack: don’t allow have crack.
6) Scrape: On the sight plane and in the 7.5mm to edge,the scrape of less than 10mm don’t allow more 2 strips.
7) The sight plane must be polishing,and sealing side must be rubbing and polishing.

2. Colour and Lustre

It should be no color and transparent,and with its self tine green is allowed.

3. Water-resistance

Cooked in the water for 5 hours,then weigh up ,then titration with 25ml    0~31    ug/g

4. Alkali-resistance

Cooked in the 0.5N NaoH for 3 hours,then Weigh up,weightlessness should be ≤75  mg/dm2

5. Temperature-resistance impacts capability

Put it into electric cooker,keep for 7min under the temperature of 260°C±1°C,then,put into the water of 20±1°C,it should not crack

6. Bend-resistance

≥80 MPa

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