Model 4500 probe is available with a durable construction and incorporating a connector with shrouded pins to prevent accidental damage. It is recommended for all new installations. This new style incorporates welded shields where required and requires a different probe connecting adaptor (see order details).
The Model 4500 Electrical Resistance (ER) probe is the most rugged mechanically and the least affected by temperature fluctuations.
Need help figuring out what length ER Probe is required based on your pipeline size and application? Try Cosasco's new Device Length Calculator.