SISCO explosion-proof float level switch utilizes a magnetic float switch reed-chain principle to convert liquid height into a proportional resistance signal. The liquid level switch delivers ±5 mm or ±10 mm accuracy over –20 to 70°C media, with pressure resistance up to 10 MPa. The magnetic level switch design ensures stable 4-20mA/HART transmission without field recalibration drift.
Multi-Point Level Monitoring and On-Site Adjustment
- Up to four independent switch points with adjustable thresholds.
- Built-in LCD for real-time level, status, and output display.
- On-site push-button tuning of setpoints, deadbands, and delays.
- Self-diagnostics trigger an alarm on sensor fault or short-circuit.
Multi-Signal Output and Remote Communication
- 4-20 mA with HART for remote configuration.
- RS485 with Modbus RTU for system integration.
- Programmable relays for high/low/window alarms with delay.
- Surge and reverse-polarity protection ensure float level transmitter accuracy.
Applications
SISCO explosion-proof float level switch with magnetic float switch and 4-20mA/HART outputs is ideal for liquid level monitoring in storage tanks, process vessels, and sumps. Its stainless steel construction and Ex d IIC T6 enclosure provide reliable performance in harsh and hazardous environments.
Chemical Industry
Electrical Industry
Petroleum Industry
Water Treatment
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| Model | SISCO-LS-UHZ-C |
| Measurement Range (Rod Length) | 100 – 6000 mm |
| Power Supply | 24V DC |
| Output Signals | 4- 20 mA with HART, RS485(Modbus RTU), Relay contacts |
| Accuracy | ±5 mm or ±10 mm |
| Body Material | 304 SS, 316L SS, or 304 SS with PTFE lining |
| Float Material | 304 SS, 316L SS, or 304 SS with PTFE lining |
| Medium Temperature | –20 °C to +70 °C |
| Pressure Rating | Up to 10 MPa (customizable) |
| Enclosure Protection | Flameproof, Ex d IIC T6 Gb |
| Switch Type | Magnetic float switch with reed-chain sensing |
| Electrical Connection | Terminal block inside housing |
Q1: What range does this explosion-proof float level switch support?
A1: The rod-type sensor covers 100 mm to 6000 mm, accommodating tanks of varying depths. Custom lengths are available, and the magnetic float switch delivers ±5 mm repeatable accuracy across the entire span.
Q2: What outputs can this magnetic level switch provide?
A2: It offers a 4-20 mA loop with HART protocol, an RS485 port with Modbus RTU, and multiple relay contacts. This versatility enables direct connection to PLCs, DCS, or standalone alarm systems without extra converters.
Q3: Why does this float level switch need Ex d IIC T6 Gb?
A3: This flameproof rating contains internal explosions and stops flame propagation. The T6 class limits surface temperature to 85°C, ensuring safe operation with hydrogen, acetylene, and other IIC-group gases in Zone 1 hazardous areas.
Tips: How to commission this 100- 6000 mm explosion-proof float level switch?
- Verify the 4-20mA/HART loop integrity. Connect a multimeter in series to check the current output matches the actual level before connecting to the control system.
- Test RS485 communication with Modbus RTU. Send a read command from the host to confirm the float level transmitter responds with correct register values.
- Simulate high and low level conditions. Manually move the magnetic float switch to trigger each setpoint and verify relay contacts change state as programmed.
- Check the LCD for consistent readings. Ensure the percentage and bar graph move smoothly with float travel, indicating the magnetic level switch sensor is functioning properly.
- Record that the Ex d IIC T6 Gb housing is properly closed. Verify all cover screws are tightened, and the cable gland is securely fastened before energizing the system.
Thank you for buying industrial test and measurement equipment on SISCO.com, all products sold by SISCO and the partner cover a 12 months warranty, effective from the date of receiving the products.
What is covered?
SISCO is responsible for providing free spare parts, and free technical support to assist the customer to repair the defective products until the problem is solved.
What is not covered?
- Product purchased from anyone other than a SISCO store or a SISCO authorized reseller.
- Expendable parts.
- Routine cleaning or normal cosmetic and mechanical wear.
- Damage from misuse, abuse or neglect.
- Damage from use of parts other than SISCO approved.
- Damage from use outside the product’s usage or storage parameters.
- Damage from use of parts not sold by SISCO.
- Damage from modification or incorporation into other products.
- Damage from repair or replacement of warranted parts by a service provider other than a SISCO authorized service provider.
- Damage caused by the application environment not meeting the product usage requirements and the failure to perform preventive maintenance.
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