• Explosion Proof Digital Panel Meter - Series DDX from APG
  • A DDX shows the number of gallons in an oil tank, measured by an MNU. The oil level goes down, measured by the DDX.
  • DDX measures while connected to the side of a tank.

Explosion Proof Digital Panel Meter


Digital Panel Meter for Class I, II, and III Hazardous Locations

Two-line, six-character display with eight LED alarm indicators, all in an explosion-proof housing.


Easy to Program
With four through-glass buttons on the face for programming in place, and a USB port for connection to a PC running MeterView Pro software, setting up the DDX is simple.

World-wide Approvals
The DDX carries FM, CSA, ATEX, and IECEx approvals for installation in Class I, II, and III hazardous locations. That may not be everywhere, but it's pretty close.

Easily to Read Display
Bright, sunlight-readable display comes standard on the DDX, with eight selectable intensity levels.

Common Model Configurations

All common model configurations can be purchased online, click the model number link below. Refer to Model Number Configurator on the datasheet for a full list of configuration options.

Explosion Proof Digital Panel Meter
Model Number Model Description
DDX-A10 85-265 VAC input power, 4-20 mA output
DDX-D14 12-24 VDC input power, 4-20 mA & 4 output relays


2 lines, 6 characters each
Top line: 0.6" (15 mm) characters
Bottom line: 0.46" (12 mm) characters
Display Update Speed
200 ms (5 updates per second)
± 0.3% of calibrated span


Supply Voltage
VAC: 85 - 265
VDC: 12 - 24
Input Impedence
Voltage Inputs: > 500 kΩ
Current Inputs: 50 - 100 Ω
SPDT Relays
3 A @ 30 VDC / 125-25 VAC resistive loads
1-14 HP (≈ 50 W) @ 125/250 VAC inductive loads
Input Contact/Digital Input
Contact Voltage: 3.3 VDC
Digital Input Logic High: 3 - 5 VDC
Digital Input Logic Low: 0 - 1.25 VDC
Default Logic: Normally Open/Low


Front panel rating
Storage Temperature
-40° - 185°F (-40° -85 °C)
Operating Temperature
-40° - 149°F (-40° - 65°C)


6.42" x 7.97" x 8.47" (163 mm x 202 mm x 215mm)
16.0 oz (7.26 kg)


Enclosure Type 4X; IP66
Class I, Div. 1, Groups B, C, D
Class II, Div. 1, Groups E, F, G
Class III, Div. 1, T5/T6
Class I, Zone 1, AEx d, IIC Gb T5/T6
Zone 21, AEx tb IIIC T90°C; Ta -40°C to +60° C
T6 Ta = -40°C to +60° C; T5 Ta = -40°C to +65° C

CSA Explosion Proof
Class I, Div. 1, Groups B, C, D
Class II, Div. 1, Groups E, F, G
Class III, Div. 1
Class I Zone 1 Ex d IIC
Zone 21 Ex tb IIIC T90°C
-40°C -40°C Enclosure Type 4X & IP66
Ex II 2 G D
Ex d IIC T* Gb
Ex tb IIIC T90°C Db IP68
Ta = -40°C to + *°C
*T6 = -40°C to +60°C
*T5 = -40°C to +65°C
Ex d IIC T* Gb
Ex tb IIIC T90°C Db IP68
Ta = -40°C to + *°C
*T6 = -40°C to +60°C
*T5 = -40°C to +65°C


Input Options
0-20 mA, 4-20 mA
0-5 VDC, 1-5 VDC, 0-10 VDC, ±10 VDC
Output Options
2 or 4 SPDT Relays
Isolated 4-20 mA
Output Transmitter Power Supply
Isolated 24 VDC @ 25 mA
Sensor Power Supply
24/10/5 VDC selectable @ 25 mA


Programmable Features
Min/Max, Tare, Hold
Multi-scale Input Display (e.g. Level & Volume)
Noise Filter
High/Low Alarms
Alternating Pump Control
Time Delay for Output Relays
4 Front-panel Push Buttons
MeterView Pro Software (with PC)