Rolls-Royce
Bureau Veritas
Renouveau La Fontaine
Englobe
National Defence
Government of QuébecOverview
The RKI OHC-800 is an all-in-one explosion-proof gas calorimeter that continuously measures calorific value, density or Wobbe index of natural gas and other paraffinic hydrocarbon gases. Its Opt-Sonic method combines an optical and a sonic sensor to limit interference, with a T90 response within 5 seconds.
- Continuous calorific value, density or Wobbe index, switched with one button
- Opt-Sonic calculation (refractive index + sound speed) limits interference from other gases
- T90 response within 5 seconds; repeatability ± 0.02 MJ/m³
- For natural gas, LPG, biogas, hydrogen blends, steel gases, flare and refinery off-gas
- Explosion-proof Ex d IIB+H2 T4, including hydrogen; IP66 / IP67
- Operates from -20 to +57 °C
- Self-diagnosis with function check and maintenance alerts; few consumables
- 4-20 mA and RS-485 outputs; 100-240 VAC or 24 VDC
The sampling system is engineered for your gas and site. Request a quote for pricing and availability.
Specifications
- Measuring Principle
- Opt-Sonic calculation from refractive index and sound speed
- Measuring Gas
- CH4-based paraffinic hydrocarbon gases such as natural gas
- Measuring Range
- Calorific value 25.00-50.00 MJ/m³ (gross, 0 °C, 101.325 kPa) / density 0.500-1.500 (specific gravity)
- Repeatability
- ± 0.02 MJ/m³
- Measuring Method
- Constant-flow gas introduction through external sampling devices
- Display
- Full-dot LCD with backlight, 3-colour LED lamp
- External Output
- 4-20 mA DC isolated (max. 300 Ω) / RS-485
- Failure Alarm
- Low flow, sensor unit abnormality, low light; contact 2 A 30 VDC
- Power Supply
- 100-240 VAC ± 10 % 50/60 Hz max. 18 VA, or 24 VDC ± 10 % max. 5 W
- Ingress Protection
- IP66 and IP67 equivalent
- Operating Conditions
- -20 to +57 °C (TIIS) / -20 to +60 °C (ATEX / IECEx); 95 % RH or less
- Explosion Proof
- Flame-proof Ex d IIB+H2 T4 (TIIS) / II 2G Ex d IIB+H2 T4 (ATEX / IECEx)
- Dimensions / Weight
- Approx. 286 x 453 x 150 mm / approx. 23 kg
Documents
Calibration and repair
Send it to our Montreal service team. We evaluate the instrument and send a detailed quote before any work starts.
Questions, answered
How fast will I get a price?
Send the quote request and a specialist replies within 4 business hours, Monday to Friday, 8:00 to 4:30 ET.
Can we pay on account or by purchase order?
Yes. With established credit, terms are Net 30 days, and you can send your purchase order with the quote request. We also accept Visa, Mastercard and American Express.
How is shipping charged?
On quotes and account orders, freight is F.O.B. Montréal: the carrier charge is worked out at shipment from the packed weight and dimensions, and added to your invoice. In-stock items can also be picked up the same day in Montréal (8605 rue du Champ-d'Eau).
Can I return it?
Yes, within 30 days of purchase, with a return authorization number from customer service first. A 25% restocking fee applies, unless it is a defect covered by the warranty. Special orders, hazardous materials, flammable liquids and gases can't be returned. Return policy
Can ERE calibrate or repair it?
Yes. Our Montréal service shop calibrates and repairs it in-house. Request service
What warranty does it carry?
The manufacturer's warranty applies. The exact terms are in the warranty document. Read the warranty
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