Elcometer 1001 Corrosion Under Insulation Gauge - Discontinued


Discontinued Product – for servicing use only

Pipeline failure through corrosion under insulation causes supply shortfalls, economic loss and environmental pollution. Early detection of the presence of moisture significantly reduces the risk of corrosion developing underneath pipeline insulation.

The Elcometer 1001 detects and identifies the location of any fluid leak on thermally insulated pipes, 24 hours a day, 365 days a year, preventing corrosion and reducing unplanned repair and maintenance costs.


User Friendly

  • Ideal for use in the oil, gas, chemical, water and power generation industries, on or off-shore
  • Easy to fit in new or existing installations
  • Straightforward replacement - a new module can be screwed on to the original funnel assembly
  • Maintenance free for 5 years with simple testing on site at any time


  • Identifies approximate location of fluid leak, preventing unnecessary removal of good insulation
  • Detachable sample vial can be sent for further testing or chemical analysis of contents


  • Can be located where flammable gases and vapour groups IIA, AAB and AAC may be present
  • 5 year warranty from date of purchase 


  • Heavy duty, impact resistant, dust and waterproof design equivalent to IP66
  • Works in extreme ambient temperatures -40°C to +80°C (-40°F to +176°F) and on pipe work at +180°C (+356°F)


  • Fast installation by one operator with minimal tools required
  • Battery life of 5 years
  • Each module has unique serial number for traceability


  • Extends the life of pipe insulation
  • Can reduce pipe replacement due to Corrosion under Insulation
  • Fail safe high visibility fluorescent float as a visual indicator
  • Powerful high intensity flashing LED alarm guaranteed to flash for a minimum of 7 days after actuation

Technical Specification

Part NumberDescription

Elcometer 1001 Leak and Corrosion Under Installation Gauge (x25)


Fluid detector for thermally insulated pipes

Power Supply

Lithium Thionyl Chloride Battery

Service Life

5 years

Max LED Alarm Operation Time

7 days from actuation

Operating Temperature

-40°C to +80°C (-40°F to +176°F)

Max Pipe Temperature

+180°C (+356°F)


ATEX Approval# - see footnote

IP Rating


Minimum Pipe Outside Diameter

17mm (0.7") combined with a minimum 15mm (0.6") thickness of insulation

Insulation Thickness Range

10mm - 80mm (0.4 - 3.1")

Protrusion from Pipe Surface

Maximum 157.0mm (6.2")
Minimum 125.4mm (4.9")

Gauge Diameter

Approximately 35.8mm (1.4")


Approximately 60g (2.1oz) - depending on funnel specification

Warranty Period

5 consecutive years from the date of purchase. The Elcometer 1001 device is warranted to activate via visual float and LED, where there is the presence of sufficient ingression of water or moisture in the device. This warranty is only valid if the device has been installed and maintained in accordance with installation instructions.

# Essential Health and Safety Requirement 1.0.6 Instructions specific to hazardous area installations (reference European ATEX Directive 94/9/EC, Annex II, 1.0.6).

The following instructions apply to this equipment covered by certificate number Sira 05ATEX2277:

The equipment may be located where flammable gases and vapours of groups IIA, IIB and IIC may be present. The equipment is only certified for use in ambient temperatures in the range of -40°C to +80°C and should not be used outside this range. The equipment has not been assessed as a safety-related device (as referred to by Directive 94/9/EC Annex II, clause 1.5). Installation of this device shall be carried out by suitably trained personnel in accordance with the applicable code of practice (EN 60079-14 within Europe).

Repair of this equipment is not permitted. If faulty in any way it must be replaced in its entirety. If the equipment is likely to come into contact with aggressive substances, then it is the responsibility of the user to take suitable precautions that prevent it from being adversely affected, thus ensuring that the type of protection is not compromised.