Flow Meters

N-Type — Rotameter

Name: N-Type — Rotameter
Brand: Sightflow

Flanged variable area flow meter · Liquid and gas measurement

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

Find your meter

Metal

Plastic

Technical data

Application and operating limits

Service: Gases and liquids; chemical process, water treatment and industrial flow systems
Viscosity: ≤3 cP
Accuracy: ±2.5% of full scale
Maximum temperature: Metal: 100°C; plastic: 60°C
Body pressure: NS and NI: 15 kg/cm²; NV: 6 kg/cm²
Glass tube pressure: 10A–50A: 6 kg/cm²; 65A–80A: 5 kg/cm²; 100A–150A: 4 kg/cm²
PC tube pressure: 10 kg/cm²; instant pressure: 15 kg/cm²

Materials and options

Models: NS stainless steel; NI steel; NV plastic wetted parts
Connection rating: JIS 5K, JIS 10K, ANSI 150# or ANSI 300#
Indicating tube: Borosilicate glass or PC
Seals: NBR, Viton or Teflon
Protection support: SS304 or SS316
Alarm: Normally open; one or two setting points
Switch rating: AC 125 V / 0.5 A; DC 100 V / 10 W; maximum DC 250 V <40 mA

Dimensions and construction

N dimensions from original datasheet — N-Type — Original dimensional drawing

N-Type flow ranges and dimensions
Size	H₂O range (L/min)	Air range (NL/min)	Flange	L (mm)	H (mm)	A (mm)
10A	0.1–1	2–20	⅜ in	230	103	—
15A	1–10	20–200	½ in	280	160	—
20A	2–20	30–300	¾ in	340	190	—
25A	5–50	100–1000	1 in	340	190	—
32A	10–100	200–2000	1¼ in	350	205	—
40A	20–200	300–3000	1½ in	350	205	—
50A	40–400	500–5000	2 in	350	205	—
65A	60–600	600–6000	2½ in	350	205	—
80A	80–800	900–9000	3 in	410	250	—
100A	100–1000	1500–15000	4 in	430	260	—
125A	200–2000	3000–30000	5 in	460	260	—

Select your N-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.