Split-Type Submersible Level Transmitter with Local Display | SLS3210
A high-performance industrial split-type hydrostatic level transmitter combining a fully welded submersible probe with an isolated, surface-mounted explosion-proof junction box featuring a live digital readout.
The SLS3210 series (including the SLS3211) is the ideal replacement for older-generation display transmitters, engineered specifically for critical industrial applications where process indicators must remain safely accessible while the sensor is submerged. Driven by a rugged sensing core with a 2x full-scale overload capability, it isolates the sensitive pressure elements downhole and transmits pristine data to a heavy-duty, surface-mounted terminal head equipped with a sharp LED or LCD local display. Certified to Ex d IIC T5 Gb flameproof standards, it delivers uncompromised safety and precision across chemical plants, metallurgy, and water utilities.
-
Separate Split-Type Design: Fully welded submersible probe paired with a separate surface junction box for convenient local viewing and wiring.
-
Flameproof Display Box: Built-in explosion-proof protection (
Ex d IIC T5 Gb) with a live LED/LCD digital display pane. -
Industrial Performance Margin: Enhanced 200% full-scale overload threshold to protect against sudden hydraulic shocks or surges.
-
HART Protocol Enabled: Supports traditional analog loops alongside digital RS485 Modbus and superimposed HART communications.
Description
Industrial Split Architecture for Maximum Accessibility
In process environments like chemical manufacturing, deep mining, and water supply grids, reading a level parameter directly at the immersion point is often physically impossible or hazardous. The SLS3210 addresses this by separating the wet-parts probe from the electrical connection point via a heavily shielded, atmospheric-vented submersible cable. While the fully welded probe monitors hydrostatic pressure continuously at the bottom of the vessel, the plant operator can easily read the live level data, program parameters, and configure terminal wiring inside the surface-mounted junction block.
Flameproof Ruggedness and Advanced Protocols
The surface junction enclosure is engineered from heavy-wall industrial materials to isolate the display electronics from demanding external environments. Holding an Ex d IIC T5 Gb explosion-proof certification, the SLS3210 series can safely be mounted in areas prone to volatile industrial atmospheres. This hardware baseline is paired with modern process communication protocols, allowing the 4–20mA current loop variant to be superimposed with the HART communication protocol for smart field asset management.
Features
-
Separate Element Topology: Keeps the digital display, parameter configuration keys, and wiring terminals safely out of the fluid path.
-
Fully Welded Sensor Probe: Puncture-resistant 316L stainless steel body features zero fluid permeation pathways for long-term underwater duty.
-
HART Protocol Superimposition: Allows smart digital communication over standard two-wire 4–20mA analog loops without additional hardware lines.
-
Adaptable Mounting Accessories: Can be customized with specialized mounting flanges or brackets for quick suspension over open channels or sealed tanks.
-
Extreme Thermal Stability: Operates reliably across a broad working temperature spectrum from -30 up to 65 degrees C.
Specification
| Parameter | Technical Specification |
| Measuring Range |
0–0.5 m up to 300 mH2O (Gauge pressure or absolute pressure optional) |
| Overload Capability |
200% Full Scale (2x FS safety buffer against pressure spikes) |
| Explosion-Proof Grade |
Flameproof |
| Local Display Interface |
Integrated 4-digit LED or LCD local process display pane |
| System Accuracy |
Standard: ±0.25% FS / High-Precision: ±0.1% FS / Max: ±0.5% FS |
| Long-Term Stability |
Typical: ±0.1% FS/year (Maximum: ±0.2% FS/year margin) |
| Probe Structure |
Hermetically sealed, fully welded submersible probe housing |
| Wetted Materials |
Premium 316L Stainless Steel construction |
| Output Signals |
4–20mA / 4–20mA with superimposed HART / 0–10V / RS485 Modbus |
| Operating Voltage |
12–30 VDC (Note: Minimum 15 VDC required when display module is active) |
| Ingress Rating |
Submersible Probe: IP68 / Surface Junction Box: IP65 minimum |
FAQ
Q: What is the main benefit of a split-type level transmitter compared to a standard sensor?
A: In standard sensors, the cable termination or display is attached right to the probe or requires separate field indicators. The split-type SLS3210 integrates the display and terminal wiring block directly into a specialized surface-mounted junction head. This keeps your electrical connections and display modules completely dry, making parameter checks and wiring maintenance fast and safe.
Q: Is there a minimum voltage requirement to run the version with the LED/LCD display?
A: Yes. While the underlying sensor core can operate at lower baseline power levels, when ordering an SLS3210 model equipped with the integrated LED or LCD local indicator panel, your external loop power supply must provide a minimum of 15 VDC to power the digital display module stably.
Q: Can this display transmitter be deployed in explosive environments?
A: Absolutely. The Sentec SLS3210 is explicitly built for hazardous processing locations and holds a certified Ex d IIC T5 Gb flameproof protection rating, making it completely safe for petrochemical installations, power stations, and metallurgy facilities.
