The Shridhan SLI Series comprises Sight Level Indicators for direct and continuous visual monitoring of liquid level in process tanks.
The transparent acrylic tube provides clear visibility of the liquid level, while a guided float and magnetic pointer indicate the rise or fall of the liquid.
Available with multiple mounting flange, float size, material and switching options, with optional reed proximity sensors, inductive proximity sensors, breather assembly and temperature indication.
✅ Genuine Shridhan product with manufacturer warranty
✅ ProSens Automation — Coimbatore, Erode & Salem
The Shridhan SLI Series Sight Level Indicator is a mechanical liquid level indication and sensing device designed to provide direct visual monitoring of liquid level in process applications.
The indicator uses a tough, transparent acrylic tube through which the liquid level can be viewed. A guided float moves with the liquid level and operates a magnetic pointer inside the guide tube, providing a continuous indication of the rise or fall of liquid level.
The SLI can also be configured with reed proximity switches or inductive proximity switches mounted to the side of the cage. These switches can be positioned according to the required sensing level and used for applications such as alarms, pump operation, solenoid operation and PLC inputs.
The brochure also provides optional arrangements including a breather assembly, PT100 temperature sensor with indicator/controller and a sight level indicator with level transmitter.
The construction and operating principle are illustrated on page 3, while the configuration and accessory options are detailed on pages 4–14 of the brochure. :contentReference[oaicite:1]{index=1} :contentReference[oaicite:2]{index=2}
The SLI is installed vertically on the process vessel. A float inside the guide arrangement follows the liquid level. The float incorporates a magnetic arrangement that moves the external pointer inside the transparent acrylic tube.
As the liquid level rises or falls, the float moves accordingly and the pointer provides a corresponding visual indication. High-level and low-level tags can be provided on the indicator for convenient reference.
For automatic level sensing, reed proximity switches or inductive proximity sensors can be mounted to the side of the cage. The sensing positions can be adjusted according to the required level.
| Component | Function |
|---|---|
| Acrylic Tube | Provides direct visibility of the liquid level and pointer. |
| Guided Stem | Guides the float movement. |
| Float | Moves according to the liquid level. |
| Magnet | Provides magnetic coupling for the external level pointer. |
| Pointer / Level Indicator | Provides visual indication of the liquid level. |
| Reed / Inductive Proximity Switch | Provides switching or sensing output at the selected level. |
These components are identified in the construction diagram on page 3 of the brochure. :contentReference[oaicite:3]{index=3}
| Configuration | Available Options |
|---|---|
| Material Type | 304 / 316 / 316L / MS |
| Mounting Flange | 85 × 85 square flange, Ø75 × 65 PCD flange, 92 × 52 rectangular flange, with breather assembly, others |
| Float Size | Ø45 mm, Ø57 mm, Ø89 mm, others |
| Float Material | 304 / 316 / 316L |
| Switching Contact Type | Not applicable, reed proximity, inductive proximity, others |
| Additional Accessories | Not applicable, PT100 temperature sensor, temperature sensor + indicator, M12 cable for inductive proximity, others |
| Mounting Position | Vertical |
The main SLI ordering structure is specified as SLI 1 2 3 4. The ordering information on page 4 defines the major configuration selections. :contentReference[oaicite:4]{index=4}
| Option | Flange / Mounting Arrangement |
|---|---|
| 1 | 85 × 85 square flange, 105 PCD |
| 2 | Ø75 × 65 PCD flange |
| 3 | 92 × 52 rectangular flange |
| 4 | With breather assembly |
| O | Others |
These flange choices are shown in the SLI ordering information on page 4. The brochure also illustrates 120 × 120 flange configurations in the later configuration pages. :contentReference[oaicite:5]{index=5} :contentReference[oaicite:6]{index=6}
| Option | Float Size & Material |
|---|---|
| 1 | Ø45 × SS304 |
| 2 | Ø57 × SS304 |
| 3 | Ø89 × SS304 |
| O | Others |
The ordering table specifies Ø45 mm, Ø57 mm and Ø89 mm float options, while the configuration pages show the corresponding 304/316/316L float material options. :contentReference[oaicite:7]{index=7} :contentReference[oaicite:8]{index=8}
| Option | Specification |
|---|---|
| Reed Proximity — SPST | 125V AC / 200V DC / 0.5A / 15VA |
| Reed Proximity — SPDT | 28V AC/DC / 0.25A / 3VA |
| Inductive Proximity | Inductive proximity sensor option |
| No Switching Contact | Not applicable |
The brochure specifically lists reed proximity SPST, reed proximity SPDT and inductive proximity sensing options. Its configuration pages also show single and dual inductive proximity sensor arrangements and single/double reed proximity arrangements. :contentReference[oaicite:9]{index=9} :contentReference[oaicite:10]{index=10}
| Accessory | Description |
|---|---|
| Breather Assembly | Sight level indicator configuration with breather assembly. |
| PT100 Temperature Sensor | Temperature sensing using a PT100 type sensor. |
| Temperature Sensor + Indicator | Temperature sensor with a temperature indicator/controller arrangement. |
| M12 Cable for Inductive Proximity | Optional M12 pin-type cable for inductive proximity sensor. |
| Other Accessories | Available as specified in the ordering information. |
The accessory list is given on page 4, and page 14 visually demonstrates SLI configurations incorporating a temperature sensor and temperature indicator. :contentReference[oaicite:11]{index=11} :contentReference[oaicite:12]{index=12}
| Parameter | Brochure Information |
|---|---|
| Material Type | 304 / 316 / 316L / MS |
| Float Material | 304 / 316 / 316L |
| Temperature | 60°C in the configurations shown in the brochure |
| Mounting Position | Vertical |
| Float Sizes | Ø45 mm / Ø57 mm / Ø89 mm and other configurations |
For example, the brochure's configuration pages show Ø45 mm and Ø57 mm float arrangements with 304/316/316L materials and 60°C temperature specification. Later pages show Ø89 mm configurations. :contentReference[oaicite:13]{index=13} :contentReference[oaicite:14]{index=14}
The brochure includes a separate arrangement titled Sight Level Indicator with Digital Indicator and Transmitter. This combines the visual sight-level arrangement with a level transmitter and enclosure.
The diagram on page 15 shows the transmitter mounted alongside the sight-level assembly, together with the acrylic tube, mounting flange, float and reed proximity switches. :contentReference[oaicite:15]{index=15}
A second arrangement shown on page 15 combines the sight level indicator with a temperature sensor and controller. The diagram identifies the temperature sensor, guide tube, acrylic tube, float, reed proximity switches and digital temperature indicator.
This configuration is useful when liquid level indication and temperature monitoring are required together in the same assembly. The brochure presents it as an available arrangement rather than providing a separate detailed technical specification. :contentReference[oaicite:16]{index=16}
| Application | Use |
|---|---|
| Process Applications | Direct visual monitoring and sensing of liquid level. |
| Tank Level Monitoring | Continuous visual indication of rising and falling liquid level. |
| High / Low Level Alarm | Switching output at selected liquid levels. |
| Pump Operation | Level-based pump operation using proximity switching. |
| Solenoid Operation | Level-based switching for solenoid operation. |
| PLC Input | Provides switching/sensing signals for PLC applications. |
The brochure explicitly identifies alarm, pump operation, solenoid operation and PLC input as switching applications for the SLI. :contentReference[oaicite:17]{index=17}
The exact supplied accessories depend on the ordered configuration. The brochure does not provide a separate standard packing list, so optional sensors, temperature accessories, breather assembly and transmitter arrangements should be confirmed with the quotation.
The Shridhan SLI Series is available through ProSens Automation for applications requiring direct visual liquid level indication with optional switching, sensing and temperature-monitoring functions.
For correct selection, share the tank application, mounting flange requirement, float size, liquid/material compatibility, required switching levels and whether reed proximity, inductive proximity, temperature or transmitter functionality is required.
ProSens Automation — Coimbatore, Erode & Salem
Shipping available across India.
The SLI Series is a mechanical sight level indicator designed for visual monitoring and sensing of liquid level in process applications.
A guided float follows the liquid level and uses magnetic coupling to move a pointer inside the transparent acrylic tube.
Yes. The brochure provides reed proximity and inductive proximity sensor options for switching and sensing.
The brochure states that reed or inductive proximity switches can be clamped to the side of the cage and adjusted to the required sensing level at site.
The ordering information specifies SPST and SPDT reed proximity options with the electrical ratings stated in the brochure.
Yes. Single and dual inductive proximity sensor arrangements are shown in the brochure.
The main ordering information lists Ø45 mm, Ø57 mm and Ø89 mm float sizes, with other sizes available as an option.
The brochure lists 304, 316, 316L and MS material configurations, with 304/316/316L listed for the float material.
The ordering information includes 85 × 85 square flange, Ø75 × 65 PCD flange and 92 × 52 rectangular flange options, along with a breather assembly configuration and other options.
Yes. A sight level indicator with breather assembly is specifically listed as an available configuration.
Yes. The brochure provides PT100 temperature sensor and temperature sensor plus indicator options, and page 15 shows a sight level indicator with temperature sensor and controller.
Yes. The brochure includes a separate sight level indicator arrangement with a level transmitter and digital indication arrangement.
The configurations shown throughout the brochure specify 60°C. The exact applicable temperature should be confirmed against the selected configuration.
