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PD663 ProtEX-Lite Explosion-Proof Loop-Powered Meter

USA Toll Free: 1-800-730-0302 Tel: 416-240-1920 -

The ProtEX-Lite PD663 is Precision Digital's most economical and compact explosion-proof, loop-powered indicator. The fact that this meter is loop-powered means that there is no need to run additional, costly power lines into a hazardous area. Like all ProtEX products, the PD663 carries FM, CSA, ATEX, and IECEx approvals for use in hazardous areas. It features a single line, four digit, display that can be easily scaled in the field for any 4-20 mA input. The PD663 is built with great looking, modern, die-cast aluminum IP68, NEMA 4X rated enclosure which includes flanges for wall or pipe mounting. This meter is available with an optional backlight feature.

PD663 Features

  • 4-20 mA Input
  • Modern, Sleek and Practical Enclosure
  • 3½+ Digits, 0.6" (15.24 mm) Display
  • Display Mountable at 0°, 90°, 180°, & 270°
  • Easy Four-Button Programming
  • Programmable Noise Filter
  • Max/Min Display
  • Loop-Powered Backlight Option
  • 1.7 V Drop (4.7 V with Backlight)
  • Explosion-Proof, IP68, NEMA 4X Enclosure
  • Flanges for Wall or Pipe Mounting
  • HART Protocol Transparent
  • Operates from -40 to 75°C

PD663 ProtEX-Lite Explosion-Proof Loop-Powered Meter Data Sheet
PD663 ProtEX-Lite Explosion-Proof Loop-Powered Meter Instruction Manual

Except where noted all specifications apply to operation at +25°C.

General Specifications

  • Display: 0.6" (15.24 mm) LCD, 3½+ digits; -1999 to 2999
  • Display Update Rate: 2 Updates/Second
  • Display Orientation: Display may be mounted at 90° increments up to 270° from default orientation.
  • Over-Range: Display Flashes 2999
  • Under-Range: Display Flashes -1999
  • Programming Method: 4 Front Panel Pushbuttons (behind glass). Magnet may also be used for programming; P/N PDA-MAG.
  • Noise Filter: Programmable HI, LOW, or OFF
  • Recalibration: Recalibration is recommended at least every 12 months.
  • Max/Min Display: Max/Min readings reached by the process are stored until reset by the user or until power to the meter is turned off.
  • Non-Volatile Memory: All programmed settings are stored in non-volatile memory for a minimum of ten years if power is lost.
  • Normal Mode Rejection: 64 dB at 50/60 Hz
  • Operating Temperature: -40 to 75°C
  • Storage Temperature: -40 to 75°C
  • Relative Humidity: 0 to 90% non-condensing
  • Connections: Removable screw terminals accept 12 to 22 AWG
  • Tightening Torque: Screw terminal connectors: 4.5 lb-in (0.5 Nm)
  • Enclosure: Explosion-proof cast aluminum with glass window, 0.30% max copper content, corrosion resistant powder coating, color: blue. NEMA 4X, IP68. Two ½" NPT threaded conduit openings. One ½" NPT nickel plated brass conduit plug with 10 mm hex key fitting installed.
  • Mounting: May be mounted directly to conduit. Two mounting holes for 1.5" pipe or wall mounting.
  • Weight: 40 oz (1.13 kg)
  • Overall Dimensions: 4.30" x 4.27" x 3.62" (109 mm x 108 mm x 92 mm) (W x H x D)
  • Warranty: 3 years parts & labor


  • Input: 4-20 mA
  • Accuracy: ±1 count
  • Temperature Drift: 50 PPM/°C from -40 to 75°C ambient
  • Decimal Point: User selectable decimal point
  • Minimum Span: Input 1 & Input 2: 0.40 mA
  • Maximum Voltage Drop: 1.7 VDC @ 20 mA; 4.7 VDC @ 20 mA with backlight option.
  • Equivalent Resistance: 85 O @ 20mA without backlight; 245 O @ 20mA with backlight
  • Loop-Powered Backlight Option: Factory installed only. Powered directly from the 4-20 mA loop, no batteries required. Backlight can be enabled or disabled via alternative wiring of
  • terminal block. The display brightness will increase as the input signal current increases.
  • HART Transparency: Analog input will not interfere with existing HART communications on the wired 4-20 mA signal

Product Ratings & Approvals

  • FM: Explosion-proof for use in Class I, Division 1, Groups B, C, D. Class II, Division 1, Groups E, F, G. Class III, Division 1; T6. Class I, Zone 1, AExd IIC T6 Gb. Zone 21, AEx tb IIIC T85°C. Ta = -40 to 75°C.
    Enclosure: Type 4X & IP66. Certificate number: 3040391
  • ATEX: II 2 G D. Ex d IIC T6 Gb. Ex tb IIIC T85°C Db IP68. Ta = -40 to 75°C.
    Certificate number: Sira 10ATEX1116X
  • IECEx: IECEx SIR 10.0056X. Ex d IIC T6 Gb. Ex tb IIIC T85 C Db IP68. Ta = -40 to 75°C
  • CSA: Class I, Division 1, Groups B, C, D. Class II, Division 1, Groups E, F, G. Class III, Division 1; T6. Class I, Zone 1, Ex d IIC T6.
    Ta = -40 to 75°C. Enclosure: Type 4X & IP66.
    Certificate number: 11 2325749


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