
The variable-area flow meter with alarm switches is a setup where BJ01 upper limit alarm and BJ02 lower limit alarm switches are added to the existing flow meter's measurement tube on the dovetail guide rails. The alarm switches can signal at any flow value, whether it be maximum, intermediate, or minimum. When the magnetic float reaches or exceeds the switch position, it utilizes the bistable magnetic action of a reed switch, which enables the flow meter and the magnetic float to open and close contacts. This mechanism is used in conjunction with relay components and other elements to meet the requirements for audible and visual alarms.
Model | Measurement Range | Interface Thread | Accuracy (±%) | ||
Liquid (GPM) | Liquid (LPM) | Gas (Nm3/h) | |||
SF LZM-15, SF LZM-15J | 0.2–2 | 0.8–8 | – | ZG1/2"M | ±4 |
0.3–3 | 1–11 | – | ZG1/2"M | ±4 | |
0.5–5 | 2–18 | – | ZG1/2"M | ±4 | |
1–7 | 2–28 | – | ZG1/2"M | ±4 | |
SF LZM-20, SF LZM-20J | 2–10 | 8–40 | 6–60, 16–80, 16–160 | ZG3/4"M | ±4 |
2–16 | 8–60 | 6–60, 16–80, 16–160 | ZG3/4"M | ±4 | |
2–20 | 8–80 | 6–60, 16–80, 16–160 | ZG3/4"M | ±4 | |
SF LZM-25, SF LZM-25J | 1.5–15 | 6–60 | – | ZG1"M | ±4 |
3–13 | 10–50 | – | ZG1"M | ±4 | |
4–24 | 10–100 | – | ZG1"M | ±4 | |
5–35 | 10–130 | – | ZG1"M | ±4 | |
5–45 | 10–170 | – | ZG1"M | ±4 | |
SF LZM-15Z | 0.1–1 | 0.5–4 | 0.3–3, 0.4–4, 0.6–6, 1–10, 2.5–25, 4–40 | ZG1/2"M, ZG1/4"F | ±4 |
0.15–1.5 | 0.6–6 | 0.3–3, 0.4–4, 0.6–6, 1–10, 2.5–25, 4–40 | ZG1/2"M, ZG1/4"F | ±4 | |
0.2–2 | 1–7 | 0.3–3, 0.4–4, 0.6–6, 1–10, 2.5–25, 4–40 | ZG1/2"M, ZG1/4"F | ±4 | |
0.3–3 | 1–11 | 0.3–3, 0.4–4, 0.6–6, 1–10, 2.5–25, 4–40 | ZG1/2"M, ZG1/4"F | ±4 | |
0.5–5 | 2–18 | 0.3–3, 0.4–4, 0.6–6, 1–10, 2.5–25, 4–40 | ZG1/2"M, ZG1/4"F | ±4 | |
SF LZM-25Z | 1–10 | 5–35 | – | ZG1"M | ±4 |
1–15 | 5–50 | – | ZG1"M | ±4 | |
2–14 | 10–50 | – | ZG1"M | ±4 | |
2–20 | 10–70 | – | ZG1"M | ±4 | |
5–35 | 10–130 | – | ZG1"M | ±4 | |
5–40 | 10–150 | – | ZG1"M | ±4 | |
5–45 | 10–170 | – | ZG1"M | ±4 | |
– | 0.3–2.1 m3/h | – | ZG1"M | ±4 | |
– | 0.6–3 m3/h | – | ZG1"M | ±4 | |
– | 0.6–4.2 m3/h | – | ZG1"M | ±4 | |
SF LZM-15G | 0.1–1 | 0.5–4 | 1–10, 1.6–16, 2.5–25, 4–40 | G1/2"F | ±4 |
0.2–2 | 1–7 | 1–10, 1.6–16, 2.5–25, 4–40 | G1/2"F | ±4 | |
0.5–5 | 1.8–18 | 1–10, 1.6–16, 2.5–25, 4–40 | G1/2"F | ±4 | |
1.5–9 | 400–2000 LPH | 1–10, 1.6–16, 2.5–25, 4–40 | G1/2"F | ±4 | |
SF LZM-20G | 1–10 | 6–60 | – | G3/4"F | ±4 |
SF LZM-25G, SF LZM-40G | 1–15 | 5–60 | – | 25G, G1"F 40G, G1-1/2"M |
±4 |
2–20 | 10–70 | – | 25G, G1"F 40G, G1-1/2"M |
±4 | |
5–30 | 20–110 | – | 25G, G1"F 40G, G1-1/2"M |
±4 | |
5–40 | 20–150 | – | 25G, G1"F 40G, G1-1/2"M |
±4 | |
SF LZM-50G | 20–80 | 80–300 | 100–500 | G2"F, G2"M | ±4 |
20–100 | 80–360 | 120–600 | G2"F, G2"M | ±4 | |
40–120 | 150–450 | 300–850 | G2"F, G2"M | ±4 | |
50–150 | 190–560 | 400–1200 | G2"F, G2"M | ±4 | |
60–200 | 220–750 | 500–1400 | G2"F, G2"M | ±4 |
Model | Nominal Diameter (mm) | Measurement Range | Accuracy (±%) | Allowed Measured Medium Condition | |||
Long Tube Type | Short Tube Type | Temperature (°C) | Pressure (MPa) | ||||
SVF LZS-15 | 15 | 10–100 L/h, 16–160 L/h, 25–250 L/h, 40–400 L/h, 60–600 L/h | 5–50 L/h, 10–100 L/h, 16–160 L/h, 25–250 L/h, 40–400 L/h, 50–500 L/h, 60–600 L/h, 100–1000 L/h | ±4 | 0–60°C | ≤0.6 | |
SVF LZS-25 | 25 | 100–1000 L/h, 160–1600 L/h, 250–2500 L/h | 100–1000 L/h, 160–1600 L/h, 4–40 L/min, 250–2500 L/h | ||||
SVF LZS-32 | 32 | – | 0.4–4 m3/h, 0.6–6 m3/h | ||||
SVF LZS-50 | 50 | 0.4–4 m3/h, 0.6–6 m3/h, 1–10 m3/h, 1.6–16 m3/h | 1–10 m3/h, 1.6–16 m3/h | ||||
SVF LZS-60 | 60 | – | 2.5–16 m3/h, 5–25 m3/h, 8–40 m3/h, 12–60 m3/h | ||||
SVF LZS-100 | 100 | 14–90 m3/h, 18–120 m3/h, 20–150 m3/h, 25–180 m3/h, 25–200 m3/h | 14–90 m3/h, 18–120 m3/h, 20–150 m3/h, 25–18 0m3/h, 25–200 m3/h | ||||
SVF LZS-125 | 125 | ||||||
SVF LZS-150 | 150 | ||||||
Note: SVF LZS-100, 125, 150 specifications flowmeter can be customized with alarm switch |
Model | LZB-6 | LZB-10 | LZB-15 | LZB-25 | |
Nominal Diameter (mm) | φ6 | φ10 | φ15 | φ25 | |
Measurement Range | Liquid (L/h) | 1–10 | 6–60 | *6–60 | 40–400 |
2.5–25 | 10–100 | *8–80 | 60–600 | ||
4–40 | 16–160 | 16–160 | 100–1000 | ||
6–60 | 25–250 | 25–250 | *160–1600 | ||
– | – | 40–400 | – | ||
Gas (Nm3/h) | 0.06–0.6 | 0.1–1 | 0.25–2.5 | *0.8–8 | |
– | 0.16–1.6 | 0.4–4 | 1–10 | ||
– | 0.25–2.5 | 0.6–6 | 1.6–16 | ||
– | 0.4–4 | – | 2.5–25 | ||
– | 0.6–6 | – | – | ||
– | – | – | – | ||
– | – | – | – | ||
– | – | – | – | ||
– | – | – | – | ||
Accuracy (±%) | 2.5 | 2.5 | 2.5 | 1.5 | |
Operating Pressure (MPa) | ≤1 | ≤1 | ≤1 | ≤0.6 | |
Note: Flow rates marked with "*" are special flow rates |
Model | SR LZB-40 | SR LZB-50 | SR LZB-80 | SR LZB-100 | SR LZB-100 | |
Nominal Diameter (mm) | ɸ40 | ɸ50 | ɸ80 | ɸ100 | ɸ100 | |
Measurement Range | Liquid (L/h) | 160–1600 | *160–1600 | 1–10 m3/h | 5–25 m3/h | *20–90 m3/h |
*180–1800 | 400–4000 | 1.6–16 m3/h | *6–35 m3/h | *20–100 m3/h | ||
250–2500 | 600–6000 | *2–20 m3/h | 8–40 m3/h | *30–100 m3/h | ||
*300–3000 | *800–8000 | *3–25 m3/h | *12–60 m3/h | *50–120 m3/h | ||
*400–4000 | *1–10 m3/h | *8–40 m3/h | *16–80 m3/h | – | ||
Gas (Nm3/h) | *1–5 m3/h | *4–16 m3/h | – | – | – | |
*1.5–6 m3/h | – | – | – | – | ||
4–40 | *6–60 | 50–250 | *60–200 | *300–1500 | ||
*5–50 | 10–100 | 80–400 | *80–400 | *300–1600 | ||
6–60 | 16–160 | *750–7500 L/min | *100–500 | *400–2000 | ||
*7–70 | *20–200 | *6–60 | 120–600 | *500–2500 | ||
*8–80 | *30–300 | – | 200–1000 | – | ||
*10–100 | *50–250 | – | – | – | ||
– | *80–400 | – | – | – | ||
Accuracy (±%) | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | |
Operating Pressure (MPa) | ≤0.6 | ≤0.6 | ≤0.4 | ≤0.4 | ≤0.4 | |
Note: Flow rates marked with "*" are special flow rates |
Model | Nominal Diameter DN (mm) | Measurement Range | Accuracy (±%) | Operating Temperature (°C) | Operating Pressure (MPa) | |
20 °C water (L/h) | 20 °C Air: 101325 Pa (m3/h) | |||||
SR LZB-VA30S-15, SR LZB-FA30S-15, SR LZB-WA30S-15 | 15 | 4–40, 6.3–63, 10–100, 12–120, 16–160, 20–200, 25–250, 30–300, 36–360, 40–400, 46–460, 63–630, 65–650, 75–750 | 0.12–1.2, 0.2–2, 0.3–3, 0.4–4, 0.5–5, 0.6–6, 0.8–8, 0.9–9, 1.2–12, 2–20 | ±1.5 | -20 °C to +80°C | ≤1 |
SR LZB-VA30S-25, SR LZB-FA30S-25, SR LZB-WA30S-25 | 25 | 40–400, 50–500, 63–630, 80–800, 100–1000, 120–1200, 160–1600, 200–2000, 250–2500, 300–3000 | 1.6–16, 2–20, 2.5–25, 3–30, 4–40, 5–50, 6–60 | – | ||
SR LZB-VA30S-40, SR LZB-FA30S-40, SR LZB-WA30S-40 | 40 | 160–1600, 200–2000, 250–2500, 300–3000, 400–4000, 600–6000 | 5–50, 6–60, 8–80, 9–90, 12–120 | ≤0.9 | ||
SR LZB-VA30S-50, SR LZB-FA30S-50, SR LZB-WA30S-50 | 50 | 250–2500, 300–3000, 400–4000, 500–5000, 630–6300, 800–8000, 1000–10000, 1500–15000, 4000–16000 | 10–100, 12–120, 16–160, 20–200, 30–300 | ≤0.7 |
Technical parameters
Applications and Functions
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