NEMA 4X Loop-Powered Feet and Inches Level Indicator


The Tek-LCD 7801A is one of Tek-Trol’s most advanced and feature-packed plastic, field-mounted, loop-powered indicators designed specifically for level applications that require a feet and inches display. The Tek-LCD 7801A can indicate up to 399 feet, 11 and 15/16 (or 7/8) inches. The Tek-LCD 7801A is built in a NEMA 4X and IP65 rated plastic enclosure which can stand up to even the harshest environmental conditions. 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 7801A stand out are its wide viewing angle display and SafeTouch® through window buttons. These buttons allow the Tek-LCD 7801A tank-side indicator to be programmed and operated through the cover window, thus eliminating the need to remove the cover in dirty or wet environments.
  • 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-Window Button Programming
  • Open Collector Alarm Output
  • Loop-Powered or External DC-Powered Backlight Standard
  • Plastic NEMA 4X, IP65 Enclosure
  • Operates from -40 °C to 75 °C
DisplayFeet and Inches display: 0.60″ (15.2 mm) high, 0 to 399 FT – 11 15/16 IN with 1/16 or 1/8 fraction display. Lower 7-digit display: 0.4″ (10.2 mm) high, 14-segment alphanumeric characters, display tag, volume 0 to 9999999, and/or 0-100 percent.
Tank Level Indicator: 20 segments, F (Full) and E (Empty)
Alarm Indication: HI and LO; Backlight: White, loop or DC powered
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 399 FT 11 15/16 IN Volume display flashes 9999999 if over range
Under RangeDisplay flashes -999999
Programming MethodFour SafeTouch through-window 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 programmed settings.
Non-Volatile 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
EnclosureNEMA 4X, IP65 plastic field enclosure. Color: grey. Material: Polycarbonate with UV Stabilizer. Three ¾” NPT threaded conduit openings. Two ¾” NPT plastic conduit plugs, with 1.29″ wrenching flats and a screwdriver slot, are included
MountingMay be mounted directly to conduit. Two slotted flanges for wall mounting or NPS 1½” to 2½” or DN 40 to 65 mm pipe
Overall Dimensions5.67″ x 5.25″ x 4.18″ (W x H x D) (144 mm x 133 mm x 106 mm)
Weight1.65 lbs (26.4 oz, 0.75 kg)

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