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The Tulsa Tank Gauge SGL Series Level Sensors convert levels into a standard 4-20 ma output signal. The SGL Model Level Gauge can be used to accurately measure liquid levels of compatible liquids. The full scale accuracy is +/- 0.1ma (see specifications). Designed for harsh environments with a 316 Stainless Steel body, chemical resistant float, and cast NEMA 4X (IP66) housing, this transmitter resists most environmental damages. Designed specifically to not require recalibrating.

The SGL Model Level Gauge is UL listed for use in Hazardous (Classified) Locations.

Tested to UL Standards: UL 1203 Standards for Explosion-Proof Electrical Equipment for use in Hazardous (Classified) Locations.

Class I Div. 1 Groups C & D

Temp. Range: -40°C to 125°C

WARNING: To prevent ignition of flammable or combustible atmospheres, disconnect power before servicing.

• Simple Design (4-20 ma Signal is generated by float location on the shaft of the gauge.)

• The design simplifies operation of the gauge and eliminates any recalibration required by devices using mod-bus communication that occurs after electrical storms.

• The Tulsa Tank Gauge carries a UL rating with the 7” float.

• Simple two wire connection.

• Accurate within a ¼ of an inch.

• Easy installation

○ Calibrated prior to shipment – Easy field setup

○ Quick install

○ No PC required

• Minimal servicing required

• Custom sizes from 5’-23’

• Rugged design built for the petrochemical industry

○ 316 SS

○ Oversized float

• 4-20mA signal for easy integration into existing RTU

• Steady reliable reading

• If you lose voltage at the site when the voltage is reapplied our level will be accurate.

• Our Level readings will not be influenced by vapor buildup in the tanks like some technologies are.

• Minimal maintenance (Wiping off the stick once a year, this also allows you to visually inspect the gauge for any corrosion).

Custom designed printed circuit boards

Providing a 4-20ma signal to your RTU’s

Scaling Sleeve & Nut

Oversized and Weighted Floats

Service: Compatible liquids.

Wetted Materials: Type 316 SS.

Accuracy: 0.1ma full scale (includes linearity, hysteresis, and repeatability).

Temperature Limit: -40°C to 125°C.

Compensated Temperature Range: (-40 to +125°C).

Power Requirements: 24 VDC Loop Power

Output Signal: 4 to 20 ma.

Loop Resistance: 0 – 900 ohms maxi- mum.

Current Consumption: 38 ma (maxi- mum).

Electrical Connections: Terminal Strip Screw Connector torque to 8 in/lbs

Process Connection: 3/4” NPT

Enclosure Rating: NEMA 4X (IP66).

Mounting Orientation: Mount Vertically.

Weight: Depends on length of device.

Agency Approvals: UL 1203 Standards for Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for use in Hazardous (Classified) Locations

WARNING: To prevent ignition of flammable or combustible atmospheres, disconnect power before servicing.

V3-C5-N4

V3=HMI view 3 values (ie. Level, TEMP, Pressure ect)

C5=Control 5 devices at site

N4=NEMA 4 Enclosure

No V= view on another device ie. Cell phone, tablet or computer

C5=Control 5 devices at site

WF=WIFI

N4=NEMA 4 Enclosure

CAUTION: Do not exceed specified supply voltage ratings. Permanent damage not covered by warranty will result. This device is not designed for 120 or 240 volt AC operation. Use only on24VDC.

1. Location

General Locations or Haz- ardous Locations Class I Div I Groups C & D Tanks and Vessels.

2. Position

Mounted vertically from a customer supplied 2” collar on top of tank / vessel, and protruding down into the tank to within 1/2” from the bottom surface.

3. 2” Bushing Connection

Use a small amount of plumber’s tape or joint compound or other suitable sealants to prevent leaks. Then marking one flange of the nut (in order to count the # of turns). Hand tighten the 2” NPT bushing nut and count the # of turns before getting hand tight (this step should be able to get 3 to 4 turns). Using pipe wrench tighten an additional 2 – 3 turns OR UNTIL AT LEAST 5 FULL THREADS ARE ENGAGED. At the end of this process you should have between 3 – 4 threads showing (National Electrical Code® (NFPA Standard 70).

4. Scaling Sleeve Adjustment

Turn the SGL Model Level Gauge clockwise until snug (this is the bottom of the level gauge bottoming out on the bottom of the tank / vessel. Turn approximately 2.5 turns counterclockwise to raise the bottom of the level gauge to 1/2” from the bottom of the tank / vessel.

5. Electrical Connections

Wire Length – The maximum length of wire connecting the level gauge and an analog receiver is a function of wire size and loop resistance. Wiring should not contribute more than 10% of the receiver resistance to total loop resistance. Wiring runs with 16 AWG recommended not to exceed 300’. Where wiring length is under 100 feet, wire as small as 22 AWG can be used.

6. Wiring

An external power supply delivering 24VDC Loop is required to power the SGL Model Level Gauge. See Fig. A for connection of the SGL Model Level Gauge to the power supply and analog receiver.

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Custom designed printed circuit boards

Scaling Sleeve & Nut

Oversized and Weighted Floats

V3-C5-N4

V6-C5-N4

V3-C5-CM-N4

V6-C5-CM-N4

V3-C5-WF-N4

V6-C5-WF-N4

3-C5-CM-N4

6-C5-CM-N4

3-C5-WF-N4

6-C5-WF-N4