Electrolab 2100 Series DLS Level Sensor is the core product line to Electrolab. Offered in a stainless-steel and fiberglass version, Electrolab is an industry leader in tank measurement. Electrolab Level Sensors use reed-switch technology making it highly accurate and reliable. The user is able to measure one or two levels with an additional third level with high-level alarm and shut-in option. The high-level alarm shut-in requires no power and, unlike competitors’ sensors, is not affected by power outages. Available in three measurement increments and lengths between 2 and 35 feet (33 feet fiberglass).


Measurement Length:

  • 2 – 35 ft. (Stainless Steel)
  • 2 – 33 ft. (Fiberglass)


  • Explosion Proof 2110EX (12V or 24V), L-standard, C, T or no housing

Level Measurement Increments:

  • 1/8-in. resolution; +/- 3/16-in. accuracy (Stainless Steel only)
  • 1/4-in. resolution; +/- 1/8-in. accuracy
  • 1/2-in. resolution; +/- 1/4-in. accuracy
  • +/- 0.1% repeatability


  • NYTROPHYL stainless steel
  • Two piece floats for field installation and replacement
  • One float used for product level
  • One float for water interface level
  • Designed to fit through a three-inch NFPT tank port
  • Operating Temperature Range: -40 degrees C to 80 degrees C

Temperature Measurement:

  • 12 inches from bottom
  • +/- 1.5 degrees C accuracy
  • Up to 8 distinct temperature measurements (one standard)

Power Requirements:

  • 5.6 VDC to 13 VDC

Power Consumption:

  • 15 mA nominal 20 mA maximum


  • 40 psi: standard


  • Modbus RTU 16-bit unsigned integer
  • Modbus RTU 32-bit floating point
  • Modbus RTU 2 x 16-bit
  • Serial Data via ASCII


  • 18 AWG recommended for digital circuits


  • Class I, Div. 1, Group D hazardous locations (when used with the Explosion Proof Housing or used with a standard housing and connected to an approved intrinsically safe barrier device)


Electrolab’s DLS2100 family of sensors, including the HLP have been approved by UL in accordance with UL913 and UL60079-Edition 6 and found to comply with the requirements of Intrinsically Safe devices.  Under these standards, 316L Stainless Steel, 304 Stainless Steel, Aliphatic Amine fiberglass and UHMW are considered to have passed the requirements for electrostatic discharge.

  • ANSI/UL-913, 7th Edition
  • CAN/CSA C22, No. 157


Open communication protocols allow Electrolab’s RU Flex 2100 DLS to interface with most manufacturers’ equipment. We offer:

  • RS485
  • Two- or four- wire communications
  • Baud rate and parity programmable
  • 4-20mA signal available when connected to an Electrolab 3010 digital-to-analog converter board
  • Wireless compatibility with preferred partners


  • High-Level Shut-In with or without test fixture

SKU Legend:

Rigid DLS 2100 Sensor: DLSAABCCTdFe

  • DLS = Digital Level Sensor
  • AA = Length of sensor in units of feet (Ft.)
  • B = Material of sensor (S for stainless steel, F for fiberglass)
  • CC = Resolution (50, 25, or 12)
  • Td = Number of temperature sensors (Example: T1)
  • Fe = Number of floats (F1 for single float option; F2 for dual float option)
  • If an order is HLS, the SKU will have an H (HLS w/ test apparatus) or HO (HLS w/o test apparatus) at the end:
  • DLS20S50T1F2H
  • DLS16S50T1F2H0