Intrinsically Safe Gas Cylinder Scales – ArlynGuard C – Data Sheet


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Take advantage of our Explosion Proof Scales that provide intrinsic safety at an affordable price. They feature a power efficient Cortex-M microprocessor incorporated on a single circuit board. Their extremely low power consumption provides long battery life from three (3) rechargeable AA batteries. The scale also supports external power supply through an intrinsically safe safety barrier. The scale features stainless steel load cells giving the scale superior overload protection for years of trouble free use.

Other features include easy installation, easy to read graphics LCD display, full numeric keypad, easy to use menu driven interface and large memory capacity. The indicator also offers Units Conversion, Net/Gross, Tare, Zero and many other secondary functions. Its housing is made from impact resistant nylon. The optional communications interface allows communication to non-hazardous areas, giving RS-232, USB, Ethernet TCP/IP, analog 4-20mA, and setpoint outputs.

Model C6 C10 C30 C40
Capacity 60lb (27kg) 100lb (45kg) 300lb (136kg) 400lb (181kg)
Readability 0.02lb (0.01kg) 0.02lb (0.01kg) 1lb (0.5kg) 1lb (0.5kg)
Platform Dimensions 9.25″ x 9.25″ (Optional 12″ x 12″, 14″ x 14″, 4″ x 4″)
Construction Aluminum Supports / Optional All Stainless Steel (SS)


  • Very Accurate – Internal resolution up to 1 part in 500,000. Nominal Resolution at 1 part in 5000.
  • Extremely Durable- Rugged, water-resistant. No moving parts.
  • Robust Construction – Stainless load cell & platform. Aluminum Supports. (All Stainless Construction Optional).
  • No Set-Up or dealer services required. Automatic calibration. Adjustable leveling legs.
  • Adjustable IS Display – Easy to view from all angles.
  • Parts Counting Option – Sampling, 100 memory locations

Additional Specifications

  • Power Requirements – Uses supplied (3) NiMH AA batteries. 1 extra set are provided with recharger. AC Power available with Safety Barrier.
  • Accuracy – 0.1% of full scale
  • Tare, Zero Range – 100% of full scale
  • Overload Condition –Display warning message at 102% of scale capacity. Mechanical stops prevent damage to 150% of capacity.
  • Display – Intrinsically Safe, 1” easy to read LCD with status annunciators
  • Operating Temp – 14ºF to 104ºF
  • Display Speed – 0.5 seconds, adjustable
  • Electronics – Power efficient Cortex-M based system, self-test feature. All electronics on 1-plug board for easy service.
  • Weighing Features – Adjustable constants, automatic calibration, 100 alphanumeric memory locations for tare, ID#s, etc.
  • Options – Setpoints, RS-422/485, and other optional features provided through Safety Barrier giving RS-232, USB, Ethernet, analog, setpoints and other options.

Intrinsically Safe

Class I, II, III, Division 1, Groups A, B, C, D, E, F & G Class I, Zone 0, AEx ia IIC (T3 Ta=60C) Indoor Hazardous (Classified) Locations. Non-incendive for use in Class I, Division 2, Groups A, B, C and D Suitable for use in Class II, Division 2, Groups F & G, Class III, Division 2 indoor Hazardous (Classified) Locations


This ArlynGuard scale is equipped with one or more of:

  • Model MKE-5-IS(-C) Digital Weight Indicator System
  • Load Cell Models 620-300-IS, 620-100-IS, 620-50-IS, 620-25-IS, 620-10-IS, 520-10000L-IS, 520-5000L-IS, 520-5000-IS, 520-2500-IS, 520-1250-IS, 320-500-IS and 320-250-IS

which are Factory Mutual (FM) Approved components as per Approval Standard 3600, 3610, 3611 and 3810.

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