Explosion-Proof Loop-Powered Flow Rate/Totalizer


The Tek-LCD 7802B is an explosion-proof, loop-powered flow rate/totalizer that can display flow rate and total from an analog output (4-20 mA) flow meter. The fact that this meter is loop-powered means that there is no need to run additional, costly power lines into a hazardous area. The display has a five digit upper display for rate, a seven alpha-numeric character lower display for total, and comes standard with a backlight. The Tek-LCD 7802B explosion-proof flow rate/totalizer carries FM, CSA, ATEX, and IECEx approvals for use in hazardous areas. Two features that really make this flow rate/totalizer stand out are a wide viewing angle display and SafeTouch® through-glass buttons. These buttons allow the Tek-LCD 7802B to be programmed and operated through the glass, thus eliminating the need to remove the cover in a hazardous area.

  • 4-20 mA Input Loop-Powered
  • 5-Digit, 0.7″ (17.8 mm) Upper Display
  • 7 Alphanumeric Character, 0.4″ (10.2 mm) Lower Display
  • Loop or External DC-Powered Backlight Standard
  • Password Protection
  • SafeTouch Through-Glass Button Programming
  • 3.0 V Drop without Backlight
  • Flanges for Wall or Pipe Mounting
  • Explosion-Proof, IP68, NEMA 4X Enclosure
  • Linear, Square Root, or Programmable Exponent
  • Rate in Second, Minute, Hour, or Day
  • Open Collector Pulse or Alarm Output
  • Operates from -40 °C to 75 °C
  • HART Protocol Transparent
DisplayUpper: Five digits (-9,999 to 99,999) 0.70″ (17.8 mm) high, 7-segment, automatic lead zero blanking.
Lower: Seven characters 0.4″ (10.2 mm) high, 14 segment alphanumeric.
Display Update RateAmbient > -25°C: 2 Updates/Second Ambient < -25°C: 1 Update/5 Seconds
Display OrientationDisplay may be mounted at 90° increments up to 270° from default orientation.
Over RangeDisplay flashes 99,999
Under RangeDisplay flashes -9,999
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.
Max/Min DisplayMax/Min readings reached by the process are stored until reset by the user or until power to the meter is turned off.
Advanced FunctionsLive input calibration, linearization, square root, or programmable exponent.
PasswordProgrammable password restricts modification of 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
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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