Crystal Rugged

Crystal Group Inc., an employee-owned and -operated small business founded in 1987, designs and manufactures rugged, high-performance computer hardware, embedded computers, networking devices, displays, power supplies, and data storage devices for high-reliability, mission- and safety-critical applications in harsh environments. In addition to field-tested, combat-proven systems, the company provides in-house customization, engineering, integration, configuration management, product life cycle planning, warranty, and support services to defense, aerospace, government, industrial, commercial, and autonomous vehicle customers.

Industry leaders and innovators have selected Crystal Group rugged computer and electronics hardware for use on more than 600 military programs, across more than 35 countries, as well as a growing number of cutting-edge autonomous vehicle, power and critical infrastructure, industrial, and commercial projects.

Crystal Group products meet or exceed IEEE, IEC, and military standards (MIL-STD-810, 167-1, 461, MIL-S-901) and FIPS 140-2 and NIAP certified options; are backed by warranty (5+ year) with in-house support. All products are manufactured in the company’s NIST compliant Hiawatha, Iowa, USA, facilities and are certified to ISO 9001:2015/AS9100 quality management standards.

Crystal Group continues to innovate and invent useful solutions to pressing challenges, and holds 25 patents on novel systems and methods, assigned between 2001 and 2017.

Crystal Group, together with its capable staff and state-of-the-art facilities, prides itself on helping to support customer goals, meet program and product requirements, and improve the lives and missions of end users – by delivering robust, rugged, and reliable products, backed by industry-leading warranty and support, and high-quality services on-time and on-budget.

Contact Details

Crystal Group, Inc.

855 Metzger Drive

Hiawatha, IA 52233

Phone (Toll-free): 1-800-378-1636

Phone (International): +1 319-978-1636

Fax: 319-393-2338

Contact form

Line Cards: 

  • Full-featured documenting process calibrator for calibrating and troubleshooting
  • Measures volts, mA, RTDs, thermocouples, frequency, and ohms to test sensors, transmitters and other instruments
  • Sources and simulate volts, mA, pressure, thermocouples, RTDs, frequency, ohms, and pressure to calibrate transmitters
  • Powers transmitters during test using loop supply with simultaneous mA measurement


  • Optional magnetic hanger for easy set-up and viewing while freeing your hands for other tasks
  • Large digit display with bright, two-level backlight makes the 83V significantly easier to read than older models
  • 6000 counts, 3-3/4 digits
  • Measure up to 1000 V AC and DC
  • Measure up to 10 A, 20 A for up to 30 seconds
  • Frequency to 200 kHz and % duty cycle
  • Resistance, continuity and diode test
  • 10,000 µF capacitance range for components and motor caps
  • Min/Max-Average recording with Min/Max Alert to capture variations automatically
  • Relative mode to remove test lead interference from low ohms measurements
  • Auto and manual ranging for maximum flexibility
  • Touch Hold to capture stable readings avoiding noisy signals
  • Large display digits and two-level bright white backlight for increased visibility
  • Analog bargraph for fast changing or unstable signals
  • Input Alert provides audible warning against wrong use of input jacks
  • Improved selectable sleep mode for long battery life
  • Access door for fast battery changes without breaking the calibration seal
  • "Classic" design with new removable holster with built in test lead and probe storage
  • Lifetime warranty
Electrical safety
All inputs are updated to the 3rd edition of ANSI/ISA S82.01 and EN61010-1 CAT IV 600 V and CAT III, 1000 V. They can withstand impulses in excess of 8.000 V and reduce risks related to surges and spikes.
  • Measure AC current with an optional current clamp accessory


Versatile multimeter for manufacturing, development and service applications
  • 5.5 digit resolution
  • Basic V DC accuracy of 0.015%
  • Dual display
  • Dedicated DC leakage current measurement
  • 2 x 4 ohms 4-wire measurement technique
  • Six dedicated buttons for fast access to instrument setups
  • Hi/Lo limit compare for Pass/Fail testing
  • Three-year warranty


  • Powerful, easy-to-use field calibrator
  • Measures volts, mA, pressure, RTDs, thermocouples, frequency, and ohms to test sensors and transmitters
  • Sources/simulates volts dc, mA, thermocouples , RTDs, frequency, ohms, and pressure to calibrate transmitters
  • Measures/sources pressure using any of 50 Fluke 750P Pressure Modules
  • Easy to read measure/source screen displays input and output simultaneously


  • Accuracy: ≤ 2.2 mm @ 30 m (≤ 3/32 in @ 100 ft)
  • Working range: ≤ 30 m (100 ft)
  • Working range with XLD: ≤ 300 m (1000 ft)
  • 1-meter drop tested
  • IP67 certified protected from dust and immersion in water with a depth of up to 1 m (or 3.3 ft) for up to 30 minutes