Liquid Level Gauges

SN Series — Mini Magnetic Level Gauge

Name: SN Series — Mini Magnetic Level Gauge
Brand: Sightflow

Side mounted · SN standard · SNS switch · SNT transmitter

Compact magnetic level indication for non-viscous and low-viscosity liquids in oil, food, beverage, medical, petrochemical and water equipment. Select a standard gauge, reed-switch arrangement or transmitter model.

Product approvals

SN Series

Technical data

Application and operating limits

Liquids: Non-viscous and low-viscosity liquids
Chamber: 1 in pipe, Schedule 10
Connection sizes: ½ in, ¾ in or 1 in; special sizes on request
Connections: BSP (PF) or NPT thread with union; JIS, ANSI or DIN flange
Centre-to-centre length: Maximum 2,000 mm
Pressure limit: 10 kg/cm² (150 psi)
Temperature limit: −20 to 90°C
Specific gravity: Minimum 0.75

Materials and indication

Chamber and wetted parts: Stainless steel 316
Indicating case: Stainless steel 316
Indicating strips: Plastic
Indicator orientation: Adjustable
Switch option: Reed switch, SPST
Transmitter option: 4–20 mA DC

Dimensions and mounting

Complete SN standard, SNS switch and SNT transmitter dimension drawings — **SN — Standard · SNS — Switch · SNT — Transmitter**

Side-mounted arrangements
Dimension	Specification
L — Centre-to-centre length	Maximum 2,000 mm
Upper extension	Maximum 100 mm
Lower extension	Standard 250 mm; maximum 400 mm
Chamber	1 in pipe, Schedule 10

Switch and transmitter

Reed switch

Contact: SPST, Form A normally open, bistable
Rating: AC 125 V / 0.5 A; DC 100 V / 10 W
Maximum DC: 250 V at less than 40 mA

Specify each switch height and whether it turns ON as the float rises or falls.

GL-T transmitter

Output / supply: 4–20 mA DC, two-wire / 10–30 VDC
Input range: 100 Ω to 45 kΩ, three-wire
Load resistance: RL maximum = (Vs − 10) × 50 Ω
Zero adjustment: 0–15%
Accuracy / linearity: ±0.1% F.S. at 23°C / ±0.1% F.S.
Temperature coefficient: ±0.02% / °C
Operating temperature: −5 to 70°C
Operating humidity: 0–90% RH
Installation / case: Head or wall mounting; nylon 6 resin, black
Terminal / weight: DIN type / approximately 50 g

Reed switch magnetic operating diagram and COM/NO terminals — **Reed switch operation**

GL-T transmitter dimensions in millimetres — **GL-T dimensions**

Transmitter terminal connections and level indicating strip — **Transmitter wiring and level sensor**

Ordering information

Select the model and connection, then enter specific gravity and centre-to-centre length. Each selected switch point requires a height and Up ON or Down ON direction.

1. Model

2. Connection size

3. Connection rating

4. Wetted parts

5. Indicating case

6. Indicating strips

7. Switch type

8. Switch points

9. Transmitter

10. Scale plate

11. Switch / transmitter housing

Specific gravity

Centre-to-centre length (mm)

13. Switch 1 ON direction

15. Switch 2 ON direction

17. Switch 3 ON direction

19. Switch 4 ON direction

Selected referenceChoose one option from each field

Request a quote

Select all options to request a quote.

Specific gravity must be at least 0.75. Centre-to-centre length must not exceed 2,000 mm. Switch heights are measured in millimetres and must not exceed the centre-to-centre length.

Specify special connections, materials, service conditions and any certification requirements.

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