Gems ELS-1100 Series Level Switch Instruction Bulletin
Below you will find brief information for Level Switch ELS-1100 Series. The ELS-1100 Series is a line of electro-optic level switches designed for use in a variety of applications, including industrial, commercial, and residential. These switches are available in a variety of configurations to meet the specific needs of your application, and they can be used to detect the level of a variety of liquids, including water, oil, and chemicals. The switches are easy to install and maintain, and they offer a high level of reliability and accuracy.
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Instruction Bulletin No. 138184 (Rev R) ELS-1100 Series Electro-Optic Level Switch Specifications Input Power Materials Housing and Prism Polysulfone or Nylon Operating Pressure 0 to 150 psig, Max. Operating Temperature 0°F to 176°F (-17.8°C to +80°C) Current Consumption 18 mA, Approximately Input Voltage See Part Number Chart Output TTL/CMOS Compatible, Open Collector EMI Susceptability Approvals 5 VDC 138167 Wet Wet 166541 175631 187575 187590 142700 143570 ±1 mm Meets Specification (MIL-STD-461B Part 2 Modified) of 10 V/M for Frequency Range 30 to 1000 MHz (Except 609 MHz = 9 V/M and 679 MHz = 7.5 V/M) C.E. EN 61326 Units Labeled Probe Condition At Current Sink 144225 144235 Output may Sink 40 mA up to 30 VDC Repeatability Part Number 143575 143577 143580 143585 UL. File E 108913 143590 148973 10-28 VDC Note: Not for use in freezing liquids 157750 169555 Installation Wet Wet Wet Wet Dry Wet Dry Dry Wet Wet Wet Dry Dry Wet Wet 1. For NPT threaded units: 169556 Dry a. Use Teflon (TFE) thread tape or Permatex #80725 plastic pipe 175632 Dry sealant to seal thread. Caution: Pipe sealant must not come in 187580 Dry contact with prism surface. 187585 b. Thread sensor into tank wall and tighten by hand. Further tighten Wet an additional one to two threads past hand-tightness. (Avoid overtightening, as this may damage threads.) 2. For 1/2" and M12 straight threaded units: a. Thread sensor into tank wall by hand until sensor housing contacts tank wall surface. ( See below for mating o-ring gland design information.) b. The sensor shall be torque tightened to 12 to 24 in-lb ( 1.4 to 2.7 N-m). This range is slightly more than “hand-tight” to insure sealing, and less than that which would cause housing or thread damage. c. CAUTION: Under no circumstances shall the sensor be tightened more than 1/6 turn beyond that required to seat the bottom of the sensor housing with the outside wall of the tank. 3. Sensor may be installed in horizontal or vertical position only. 4. Caution: Do not install sensor close to infrared sources or incandescent light. (Note: Any optical sensor may be affected by reflective surfaces. Consult Gems if prism is to be less than 2 inches from any reflective surface.) The test depicted below was performed to determine the sensor immunity level to ambient light. The recorded ambient is the maximum level at which the sensor performs/detects normally. Sensor Type Variac a Test Sensors Light Meter GE Model #214 Black Container Opaque Container ELS-1100 Polysulfone 300 Ft-Cd 45 Ft-Cd ELS-1100 TFE 100 Ft-Cd 25 Ft-Cd ELS-1100HT Isoplast 500 Ft-Cd 250 Ft-Cd ELS-1200 RE 250 Ft-Cd 25 Ft-Cd ELS-1200 >1000 Ft-Cd 700 Ft-Cd ELS-1200CR 400 Ft-Cd 25 Ft-Cd ELS-1100 Nylon 65 Ft-Cd 25 Ft-Cd Note: 1 Ft-Cd = 10.7 Lux Test Container(s) Above testing is based on minimum readings of at least two (2) samples. Typical Wiring Diagrams Installation (Contd.) 5. Connect VDC (±10%) power to red lead; return (-) to black lead. Caution: Do not connect output to VDC power without a load. 6. Output Configuration: See Wiring Diagrams. Input Power + VDC Load Input + VDC Power + VDC L ** Red White * Maintenance Black Switch O A D Red White Sensor may require a periodic cleaning of prism surface. Chlorinated hydrocarbons must not be used for cleaning. A mild detergent may be used to clean prism surface. Switch Black Return Policy Load + VDC Returns are accepted on stock items up to 30 days from date of order. You must contact our Returns Department for a Return Authorization (RA) number. Return the goods - freight prepaid - in the original container and include original packing slip. C. O. D. returns are not accepted. Gems reserves the right to apply restocking charges. ** Notes Input Power + VDC Red White Black * TTL/CMOS Output: For levels greater than 5 volts, a 10K pull-up resistor is required at the output. Switch ** Maximum Load = 40mA @30 VDC Tel: 860-793-4357 Fax: 860-793-4563 Mating O-Ring Gland Design M12 X 1 Straight Thread 1/2" Straight Thread SAE #5 TUBE FITTING .555 (AT TOP) ∅ .550 12° 45° .108 .093 ∅ .570 ± .002 [14.5 ± .05 mm] .020 [.50 mm] .150 [3.80 mm] M12 X 1 - 8G 1/2-20 UNF 2B Dimensions 1/4” NPT 5/8” HEX (15.9 mm) Lead Wires Epoxy Encapsulated 2-5/32” (54.7 mm) 1/2” Straight Thread Mounting with O-Ring 1/4” NPT Mounting with 3/8” Conduit 1/4” NPT Mounting 5/8” HEX (15.9 mm) 1/4” NPT 3/8” NPT Mounting 1/2” - 20 UNF .47” Ref. 2-5/32” (54.7 mm) Viton O-Ring 5/8” HEX (15.9 mm) 2-5/32” (54.7 mm) Electrical Termination: Lead Wires, 22 AWG, PVC Jacketed, 12” to 14” Extended Flange Mounting Threaded Holes Not Required M12x1 Straight Thread Mounting with O-Ring M12 x 1 → .47” ← Viton O-Ring Ref. 2-5/32” (54.7 mm) 5/8” HEX (15.9 mm) → ←1/4” Max. Wall Thickness 2.16” Ref. 11/16”-16 Thd. REF 1/8” Thick Viton Gasket Electrical Termination: Lead Wires, 22 AWG, PVC Jacketed, 12” to 14” Extended “Fish” Pull Ring 2-5/8” Ref. (66.7 mm) Removable PVC Fish Pull Ring Cable 5/8” HEX (15.9 mm) 25’ Cable, 22 AWG, PVC Jacketed Important Points: • Gems products must be maintained and installed in strict accordance with the National Electrical Code and the applicable Gems Product Instruction Bulletin that covers installation, operation and proper maintenance. Failure to observe this information may result in serious injury or damages. • For hazardous area applications involving such things as, but not limited to, ignitable mixtures, combustible dust and flammable materials, use an appropriate explosion proof enclosure or intrinsically safe interface device. • Please adhere to the pressure and temperature limitations shown throughout this catalog for our level and flow sensors. These limitations must not be exceeded. These pressures and temperatures take into consideration possible system surge pressures, temperatures and their frequencies. • Selection of materials for compatibility with the media is critical to the life and operation of Gems products. Take care in the proper selection of materials of construction, testing is required. • Stainless steel is generally regarded as safe by NSF and FDA. • NSF-approved sensors are made of materials approved for potable water applications according to Standard 61. • Life expectancy of switch contacts varies with application. Contact Gems if life cycle testing is required. • Ambient temperature changes do affect switch set points, since the gravity of a liquid can vary with temperature. • Our sensors have been designed to resist shock and vibration. However, shock and vibration should be minimized. • Filter liquid media containing particulate and/or debris to ensure the proper operation of our products. • Electrical entries and mounting points in an enclosed tank may require liquid/vaporsealing. • Our sensors must not be field-repaired. Gems Sensors Inc. One Cowles Road Plainville, CT 06062-1198 Toll-Free: 1-800-378-1600
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Key Features
- Electro-optic level sensing
- Polysulfone or nylon housing
- 0 to 150 psig operating pressure
- 0°F to 176°F operating temperature
- TTL/CMOS compatible output
- EMI resistant
- UL & CE approved
- Various mounting options
- Easy to install and maintain
- High reliability and accuracy
Frequently Answers and Questions
What is the operating pressure range of the ELS-1100 Series level switch?
The ELS-1100 Series level switch has an operating pressure range of 0 to 150 psig.
What is the operating temperature range of the ELS-1100 Series level switch?
The ELS-1100 Series level switch has an operating temperature range of 0°F to 176°F.
What is the output type of the ELS-1100 Series level switch?
The ELS-1100 Series level switch has a TTL/CMOS compatible output.
What kind of housing materials are available for the ELS-1100 Series level switch?
The ELS-1100 Series level switch is available in either polysulfone or nylon housing.
Are the ELS-1100 Series level switches UL and CE approved?
Yes, the ELS-1100 Series level switches are both UL and CE approved.
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