Technical Data and Specification

PurgeNet Machine Interface Welding Power Sources PPM Readings Weld Purge MonitorThe PurgeNet™ Machine Interface Lead connects to the port on the Weld Purge Monitor®. Charging can also be facilitated from this lead as can the use of other PurgeNet™ accessories.

Oxygen readings are communicated through industry standard 4020A current loop and relay signals. The interface also includes a power supply to charge / power your PurgEye® Weld Purge Monitors from a standard 12-24V supply found in most industrial machines.


For PurgEye® Weld Purge Monitors® with 10 to 1000 ppm range, the current output from the interface is linear, with 4mA representing 0 ppm and 20mA representing 1,000 ppm, with a resolution better than 1 ppm.

For the PurgEye® 600 Touch, with a measuring range of 10 to 250, 000 ppm, the current output is split into two linear output ranges, as follow:

PurgEye® 600 Touch

0 – 1,000 ppm
1,000 – 250,000 ppm

Current Output

 4mA - 12mA
12mA - 20mA


< 1 ppm
 ~ 100 ppm


Slow flash
PNA-01 is correctly powered and receiving valid data from your PurgEye®.

PNA-01 is correctly powered but no data is being received from your PurgEye®.

The PNA-01 is not powered, ensure the current loop and supply connections are correctly configured. See ‘Connections’ below.


The basic connections required to get the module working are shown below (the power supply is optional for battery powered models). The status input can be used to control the sample pump in your PurgEye®, use a volt-free contact to connect the ‘IN’ terminal to the ‘0 VDC’ terminal to activate the input.

PurgEye® Weld Purge Monitors®

LIN (PurgeNet™ Data)
NEG (PurgeNet™ Ground)
POS (PurgeNet™ Supply)
IN (Status)
+12 - 24 VDC

12-24 V
Power supply

For voltage output using the 4-20mA output, connect as below:

Relay 1
Relay 1
Relay 2
Relay 2
4 - 20mA
4 - 20mA

12-24 V
Power supply

100 ohm Resistor

The 10 ppm Weld Purge Monitors (excluding the Nano) PurgEye® 200, PurgEye® 500, PurgEye® 600, PurgEye® 1000 and PurgEye® 1500 Site all now comes complete with PurgeNet™ Smart Cable.

Please see individual PurgEye® Weld Purge Monitors® for further specification.

Auxiliary items:

  • PurgeNet™ Smart Cable for charging with multi-plug options

  • PurgeAlarm™ Traffic Light Visual warning accessory

  • PurgeLog™ Data Logging Software for Quality Control


Compare all Weld Purge Monitors

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