Flow Meters

SM Type — Rotameter

Low-flow water and air measurement · Glass metering tube

Select a scale for your application, then choose the available connections and options. Original drawings and the complete source PDF are included below.

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SM Type

Technical data

Application and operating limits

Service: Water and air
Accuracy / repeatability: ±3% full scale / 1%
Maximum working pressure: 200 psig (14 kg/cm²), glass tube
Maximum temperature: 95°C
Flow direction: Bottom to top
Range basis: Water at 70°F; air at STP, as listed in the range tables

Materials and construction

Body / needle valve: Stainless steel 316
Metering tube: Borosilicate glass
O-rings: Viton; other materials on request
Floats: Glass, sapphire, stainless steel, Carboloy or tantalum; fixed by scale
Connections: ¼ in NPT female
Weight: 0.5–0.6 kg

Dimensions and construction

Complete SM front, side, rear and panel cutout drawings — **SM Type — Original construction and panel cutout**

SM mounting dimensions — mm
Overall height	Width	Depth	Connection centres	Mounting centres
153	33.5	40	114	77

Select your SM Type meter

Choose your fluid, units and maximum range to compare the available scales.

1–3. Your flow requirements

1. Fluid2. Flow units3. Max flow range

4. Choose a matching meter

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6. Your selection

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