PD6620 Loop Leader Loop-Powered Intrinsically Safe & Nonincendive Rate/Totalizer

Brand: Precision Digital Corporation

These instrinsically safe and nonincendive, loop-powered 1/8 DIN flow rate/totalizers can be installed virtually anywhere to provide convenient and informative displays of flow rate and total from a 4-20 mA signal.

One of the most convenient features of these instruments is their ability to display both flow rate and total at the same time.

For instance, flow rate is typically displayed on the 5-digit alphanumeric top line and flow total or grand total is typically displayed on the 8-digit alphanumeric bottom line.

Both of these lines use 14-segment, alphanumeric characters for clear indication of tags, units or alarm messages.

Further enhancing the display on these instruments is a 20-segment bargraph available on the PD6624/6 that also includes a numeric value of the percentage the bargraph represents.
  • 1/8 DIN Loop-Powered Flow Rate/Totalizers with NEMA 4X, IP65 Front
  • 4-20 mA Input Displayed with ±0.02% Accuracy
  • 1.5 Volt Drop - 4.5 Volt Drop with Backlight
  • 0.7" / 17.8 mm 5 Alphanumeric Characters Top Display
  • 0.4" / 10.2 mm - 8 Alphanumeric Characters Bottom Display
  • 8-Digit Total & Grand Total Display, Up to 13 Digits Using Both Lines
  • Display Rate & Total Simultaneously
  • Automatic or Manual Batch Control
  • Display Open Channel Flow with Programmable Exponent Feature
  • 32-Point Linearization & Square Root Extraction
  • 20-Segment Bargraph with Numeric Percent Indication, Optional
  • 2 Open Collector Outputs Standard; Assignable to Pulse, Alarm, Timer, or Stopwatch
  • 2 Optional Loop-Powered Solid State Relays; Assignable to Alarm, Sample, Timer, Batch, or Stopwatch
  • Stopwatch & Timer Functions to Drive Relays & Open Collectors
  • Optional Isolated 4-20 mA Analog Output
  • Display Relay Runtime & Cycle Count via Relay Info Menu
  • Free PC-Based MeterView XL USB Programming Software
  • Loop-Powered Backlight with Red Backlight for Alarm Conditions
  • Safe Area Operating Temperature Range: -40 to 167°F / -40 to 75°C
  • Conformal Coated PCBs for Dust & Humidity Protection
  • UL & C-UL 61010 Listed for Electrical Safety
  • UL & C-UL Listed as Intrinsically Safe and Nonincendive
  • ATEX and IECEx Certified as Intrinsically Safe
  • 3-Year Warranty



  • Dual-line LCD with backlight
  • Both lines 14-segment alphanumeric
  • Top: 0.7” / 17.8 mm
  • Bottom: 0.4” / 10.2 mm
  • Display may be programmed to turn red and flash a user-defined message on alarm condition

Operating Temperature Range

  • -40° to 75° C for Safe Area Product
  • -40° to 70° C for Hazardous Area Products

Storage Temperature Range

  • -40° to 85° C

Relative Humidity

  • 0 to 90 % Non-condensing


  • Removable screw terminals accept 12 to 22 AWG


  • 8.7 oz - 247 g with option board


  • 3 Years Parts and Labor


  • 4-20 mA


  • ± 0.02 % of span ± 1 count
  • Square root and programmable exponent: 10-100 % FS

Hazardous Area Approvals

  • ATEX: II 1G, Ex ia IIC T4 Ga, Ta = -40° C to +70° C Certificate Number: CML 17ATEX2015X
  • IECEx: Ex ia IIC T4 Ga, Tamb = -40° C to +70° C Certificate Number: IECEx CML 17.0008X
  • UL & C-UL Listed as Intrinsically Safe and Nonincendive: Class I, Division 1, Groups A, B, C and D T4, Class I, Division 2, Groups A, B, C and D T4 Ex ia IIC T4 (Canada), Class I Zone 0, Zone 1 AEx ia IIC T4 (U.S.) Class I Zone 2, Group IIC T4 (U.S.) PROCESS CONTROL EQUIPMENT FOR USE IN HAZARDOUS LOCATIONS
  • UL & C-UL 61010 Listed for Electrical Safety and Type 4X Environmental: Standards for Safety: IEC 61010-1:2010 (3rd Edition), UL 61010-1, 3rd Edition, CAN/CSA-C22.2 No. 61010-1-12, 3rd Edition, Additional Standards: UL 50E
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