Newson Gale Ltd

OhmGuard®

Intrinsically safe hose continuity tester

OhmGuard Features
Electrical continuity tester designed to test hoses used on vacuum trucks.

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Ambient Temperature Range-40°C to +60°C
Ingress ProtectionIP 66
ConstructionStainless Steel (SS grade: 304)
Monitoring CircuitIntrinsically safe
Monitoring Loop ResistanceNominally ≤10 Ohm (± 10%)
Cable Entries3 x M20, 1 x M25
Power Supply115 V or 230 V AC, 50-60 Hz
Current Rating200 mA
Power Rating10 Watts
Ambient Temperature Range-40°C to +60°C
Ingress ProtectionIP 66
ConstructionGRP with carbon loading
Output to Monitoring UnitIntrinsically safe
Output Channel Relay8 off Voltage free change over switch contacts
Output Group Relay2 off Voltage free change over switch contacts
Output Fault Relay1 off Voltage free change over switch contacts
Relay Contact Rating240 V AC, 5 A, 500 VA max resistive
30 V DC, 2 A, 60 W max resistive
Cable Entries12 x M20
Enclosure MaterialGRP with carbon loading
Cable Entries8 Way – 10 x M20, 1 x M25
4 Way – 6 x M20, 1 x M25
Enclosure MaterialGRP with carbon loading
Cable Entries1x M20
A single grounding system that provides site operators with eight independent active ground monitoring circuits.
Ambient Temperature Range -40°C to +60°C
Ingress Protection IP 66
Construction Stainless Steel (SS grade: 304)
Monitoring Circuit Intrinsically safe
Monitoring Loop Resistance Nominally ≤10 Ohm (± 10%)
Cable Entries 3 x M20, 1 x M25
Power Supply115 V or 230 V AC, 50-60 Hz
Current Rating200 mA
Power Rating10 Watts
Ambient Temperature Range-40°C to +60°C
Ingress ProtectionIP 66
ConstructionStainless Steel (SS grade: 316L)
Output to Monitoring UnitIntrinsically safe
Output Channel Relay8 off Voltage free change over switch contacts
Output Group Relay2 off Voltage free change over switch contacts
Output Fault Relay1 off Voltage free change over switch contacts
Relay Contact Rating240 V AC, 5 A, 500 VA max resistive
30 V DC, 2 A, 60 W max resistive
Cable Entries12 x M20
Enclosure MaterialStainless Steel (SS grade: 316L)
Cable Entries8 Way – 10 x M20, 1 x M25
4 Way – 6 x M20, 1 x M25
Enclosure MaterialStainless Steel (SS grade: 316L)
Cable Entries1x M20
A single grounding system that provides site operators with eight independent active ground monitoring circuits.

The OhmGuard® electrical continuity tester is designed to test hoses used on vacuum trucks, tank trucks and plant equipment prior to the transfer of flammable or combustible products.

Hoses play an important role in hazardous area operations and owing to their direct interaction with moving liquids and powders can be at risk of becoming electrostatically charged. At no point in its structure should the metal components of a hose be permitted to accumulate static electricity.

Examples of metal components that have the potential to accumulate static charge are couplings and metal wire helixes.

  • Testing vacuum truck hoses prior to spill cleanup or material recovery operations.
  • Testing bulk road tanker hoses prior to the delivery of flammable products (e.g. solvents) to storage tank farms.
  • General resistance testing of chemical and petrochemically compatible hoses.
  • Spot testing of bonding assemblies and conductors in the field.

Easy to operate with a one-time test with clear visual GO/NO-GO LED indication.

Periodic resistance testing of hoses with meters by a responsible person (experienced electrician) helps identify potentially faulty hoses so that they can be removed from service.

Another option is to supply drivers with an easy-to-use hose continuity tester that provides an LED indicator to indicate a PASS or FAIL test of the hose. It should be emphasized that drivers must be suitably trained as being competent to use such testers.

Enables early detection of faults without the need to wait for scheduled periodic testing.

The OhmGuard® provides operators with a visual indication if the resistance is below the OhmGuard® upper limit via a flashing green LED.

Truck hose testing with an OhmGuard® connected via a truck mounted junction box.
Truck hose testing with an OhmGuard® connected via a truck mounted junction box.
Learn more about Industry Standards and Guidelines relating to static electricity in explosive hazardous areas:
  • Gain insights into the specification of hazardous area certified equipment.
  • Understand standards referenced in the industry.
  • Learn about the selection of Ex equipment.
  • Evaluate competency requirements for individuals.
  • Navigate Ex equipment documentations.
Industry Standards & Guidelines

ExVeritas 21UKEX0834

ExVertitas 19ATEX0543

IECEx EXV 19.0058

cCSAus CofC 1443677

cCSAus CofC Supp 1443677

CCC 2021312309000481

KCs GAS 22-AV4BO-0298X

KCs DUST 22-AV4BO-0299X​

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Book a live product demo

Newson Gale has an extensive product range that can be tailored to your processes and the range of hazardous area classifications at your location. The most effective way to identify what is applicable for your operations is by talking to our team. They will provide in-depth information on the products, features and how the range of options can be tailored to your needs.