Explosion-Proof Loop-Powered Feet and Inches Level Indicator


The Tek-LCD 7801B is one of Tek-Trol’s most advanced and feature-packed explosion-proof, loop-powered indicators designed specifically for level applications that require a feet & inches display. The Tek-LCD 7801B can indicate up to 699 feet, 11 and 15/16 (or 7/8) inches. The Tek-LCD 7801B explosion-proof level indicator carries FM, CSA, ATEX, and IECEx approvals for use in hazardous areas. It features a dual-line display that can be easily scaled in the field for any 4-20 mA analog input. Two features that really make the Tek-LCD 7801B stand out are its wide viewing angle display and SafeTouch® through-glass buttons. These buttons allow the Tek-LCD 7801B tank-side indicator to be programmed and operated through the glass, thus eliminating the need to remove the cover in a hazardous area.
  • Display Level in Feet & Inches
  • 4-20 mA Input Loop-Powered
  • Programmable 1/8 or 1/16 Inch Display
  • 20-Segment Tank Level Indicator
  • Lower Display for Tag, Volume, or Percent
  • SafeTouch® Through-Glass Button Programming
  • Open Collector Alarm Output
  • Loop-Powered or External DC-Powered Backlight Standard
  • Explosion-Proof, IP68, NEMA 4X Enclosure
  • Operates from -40 °C to 75 °C
 DisplayFeet & Inches display: 0.60″ (15.2 mm) high, 0 to 699 FT – 11 15/16 IN with 1/16 or 1/8 fraction display
Display AssignmentLower display may be assigned to custom unit or tag, volume, volume and tag, percent height, percent height and tag,
or off.
Display Update RateAmbient > -25°C: 2 Updates/Second Ambient < -25°C: 1 Update/5 Seconds
Externally Powered BacklightVoltage Range: 9-36 VDC
Over RangeLevel display flashes to 699 FT 11 15/16 IN Volume display flashes 9999999 if over range
Under Range-999999 if under range
Programming MethodFour SafeTouch® through-glass buttons when cover is installed. Four internal pushbuttons when cover is removed
Noise FilterProgrammable low (LO), medium (MED), high (HI), or off (OFF)
RecalibrationRecalibration is recommended at least every 12 months
PasswordProgrammable password restricts modification of settings.
Nonvolatile MemoryAll programmed settings are stored in non-volatile memory for a minimum of ten years if power is lost.
Normal Mode Rejection64 dB at 50/60 Hz
Operating Temperature Range-40 °C to 75 °C
Storage Temperature Range-40 °C to 75 °C
Relative Humidity0 to 90% non-condensing
ConnectionsScrew terminals accept 12 to 22 AWG wire
EnclosureExplosion-proof die cast aluminum with glass window, corrosion resistant epoxy coating
MountingMay be mounted directly to conduit. Two slotted flanges for wall mounting or NPS 1½” to 2½” or DN 40 to 65 mm pipe mounting.
Overall Dimensions5.65″ x 5.25″ x 4.86″ (W x H x D) (144 mm x 133 mm x 124 mm)
Weight5.00 lbs (80 oz, 2.27 kg)

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