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Products»Precision Digital»Loop-Powered Meters
ProtEX-Lite Explosion-Proof Loop-Powered Process Meter (PD663)
Manufacturer: Precision Digital
Starting at: $379.00 (USD)
Delivery: 1 to 2 weeks

The PD663 is a rugged, explosion-proof NEMA 4X loop-powered meter perfect for applications where a simple, inexpensive display is required in a hazardous area.

The PD663 derives all its power from the 4-20 mA loop. The PD663 is scaled using four push buttons and can be done without applying an actual calibration signal, and through the explosion-proof enclosure with optional magnetic reed switches and a magnet key. The PD663's display will read up to 2999; we call this 3+ digits! The loop-powered backlighting option lets you see the display under any lighting condition and is powered completely from the 4-20 mA loop. This means there is no need for additional wiring and never any batteries to change.


  • 4-20 mA Input

  • Modern, Sleek and Practical Enclosure

  • 3+ Digits, 0.6" (15.24 mm) Display

  • Display Mountable at 0, 90, 180, & 270 Degrees.

  • 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 75C

ProtEX-Lite Explosion-Proof Loop-Powered Process Meter

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


Display: 0.6" (15.24 mm) LCD, 3+ 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 75C
Storage Temperature: -40 to 75C
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 " NPT threaded conduit openings. One " 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 75C 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 Ω @ 20mA without backlight; 245 Ω @ 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.

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 T85C. Ta=-40 to 75C.

Enclosure: Type 4X & IP66. Certificate number: 3040391

ATEX: II 2 G D. Ex d IIC T6 Gb. Ex tb IIIC T85C Db IP68. Ta=-40 to 75C.

Certificate number: Sira 10ATEX1116X

IECEx: IECEx SIR 10.0056X. Ex d IIC T6 Gb. Ex tb IIIC T85 C Db IP68. Ta=-40 to 75C

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 75C. Enclosure: Type 4X & IP66.

Certificate number: 11 2325749

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