Sight Flow Indicators

FT-Series Flow Meter Sight Glass Gauge

Threaded flow observation with a spring paddle or drip tube

The FT-Series indicates flow rate for convenient observation of gas or liquid moving in horizontal or vertical pipework.

CE 2810Marking options available

FTA TYPE

FTB TYPE

Service and indication

Compatible gas and liquid service for water treatment and industrial flow systems
Double-window observation with flow in any direction
Spring-paddle indication or drip tube without a flow scale

Technical data

Operating limits

Maximum working temperature: 80°C
FTB minimum working temperature: -20°C
FTA maximum working pressure: 10 kg/cm² at 25°C water
FTB maximum working pressure: 15 kg/cm² at 25°C water

Materials and connections

Body: SS304, SS316 or SS316L
Paddle and spring: SS316
Gauge: Tempered glass
Gasket: Teflon or Gore-Tex
Connection threads: NPT, PF (BSPP) or optional thread

Dimensions

Dimensions in millimetres. FTA and FTB paddle drawings are shown beside the drip-tube type and mounting positions, as in the PDF.

FTA Type side and front drawings with H, L and Spring Paddle callouts — **FTA Type (with paddle)**

FTB Type side and front drawings with H, L and Spring Paddle callouts — **FTB Type (with paddle)**

Drip Tube Type without paddle, retaining the source Drip Tube callout — **Drip Tube Type (without paddle)**

FT-Series permitted horizontal and vertical mounting positions — **Mounting Position**

FT-Series dimensions
Dimension	15A	20A	25A	32A	40A	50A
FTA — L	114	114	114	130	130	150
FTA — H	72	72	72	120	120	136
FTB — L	114	114	114	130	130	150
FTB — H	72	72	72	115	115	129

Flow range table

Flow ranges are available only with the spring-paddle indication. Drip-tube models have no flow scale.

Available flow ranges

Ordering information

Choose your options to build an enquiry reference.

1. Model

2. Indication

3. Body material

4. Connection size

5. Connection thread

6. Flow range

7. CE 2810 mark request

Selected referenceChoose one option from each field

Request a quote

Select all options to request a quote.

Specifications are general selection guidance. Confirm materials, connection standards, operating temperature and pressure with Sightflow before placing an order.