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Model HY4000

Hydrogen Probe
Retractable with Packing Gland

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Model HY4000 is a high pressure hydrogen probe which can be used for pressures up to 2,000 psi. Hydrogen probes are commonly used for monitoring hydrogen permeation in steels, which could lead to embrittlement, blistering, and decarburization resulting in the failure of the material. The probe assembly consists of three subassemblies: the gauge assembly, the insertion rod sensing element assembly, and the packing gland assembly. The gauge assembly consists of a gauge body, a pressure gauge (0-40 psi), a temperature gauge, and a bleed valve. The sensing element is about 3.5 inches long and consists of a thin-walled tube which is sealed from the process and allows nascent hydrogen to permeate.

The probe can be supplied with or without the gauge assembly, which can be bought separately if required.

The Easy Tool is required for probe insertion or retraction in systems with pressure over 150 pounds.

Related Documents

 Easy Tool
 Safety Chain Instructions
 Packing Gland Instructions
 Length Calculation for Retractable Probes
 Canadian Registration Numbers (CRNs)


Probe Body - 316 Stainless Steel
Temperature Rating - 500° F / 260° C
Pressure Rating - 2000 PSI / 138 Bar
Mounting - 1" Full Port Valve (Min.)


HY4000 Ordering Information

HY0030 - Hydrogen Probe w/ Gauge Assembly
HY4532 - Hydrogen Probe 1" NPT Female Thread with Packing Gland & Gauge
  Hydrogen Element Diameter
20 - 5/8"
  Seal Type
0 - All welded
24 - 17.53" max. insertion length
30 - 23.53" max. insertion length
36 - 29.53" max. insertion length
42 - 35.53" max. insertion length
Your Part Number



Replacement Gauge Assembly Parts
Part # Description  
PS5509 Gauge Assembly (complete) - contains all parts listed below
PR6441158 Pressure Gauge
PR6032 Temperature Gauge
PR6034 Bleed Valve
PS5603158 Gauge Block/Rod Assembly
  Metal Samples Company
P.O. Box 8
152 Metal Samples Rd.
Munford, AL 36268
Phone: (256) 358-4202
Fax: (256) 358-4515

E-mail: msc@alspi.com
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Metal Samples Company is a division of Alabama Specialty Products, Inc. - Copyright © 2020