Explosion-proof gas calorimeter OHC-800

Manufacturer: RIKEN KEIKI

Product Type: Gas Detection: fixed system

Product Features

Supported Gas List

Natural gas
Steel gases (COG,BFG,LDG)
LPG
Natural gas with Hydrogen
Flare gas
Methane
Natural gas with LPG
Boil-off gas
E-methane
Renewable natural gas
Off-gas from refinery
Butane
Biogas
Methanation gas
Low calorie gases, and so on
Biogas with LPG
Hydrogen
Any other gases can be accommodated by customizing our sensors or the settings.

Description

OHC-800 Applications

The OHC-800 has been introduced into various industrial sectors where calorimetric measurement is required, such as oil refining, steel industry, ship building, laboratories, universities, food industry, gas companies, turbine manufacturers, and glass manufacturers.

Optimization of air-fuel ratio for turbines and furnaces

Calorific efficiency brings stability and greater energy output which leads to increased turbine life and furnace efficiency. Therefore leading to lower maintenance and running costs and increased financial returns.

Calorific adjustment of natural gas or LNG vaporized gas

Cost Reduction of fuel gas and stabilization of quality

Calorimetry and composition analysis of steel by-product gas

Efficient reuse of steel by-product gas and improvement of the production efficiency by automating the operation of the furnaces properly

Calorimetric measurement of petroleum refined by-product gas

Efficient reuse of by-product gas

Power to Gas
（H2 injection and/or Methanation）

Accurate calorimetry of natural gas containing hydrogen

Optimization of calorific values in glass production, pottery production and food production

Stabilization of product quality and improvement of production efficiency

Determination of transaction price

Real-time calorific value (CV) fiscal metering
* OIML R140 Class A Approval

Methane Number (MN) measurement

Control and prevent engine knocking

Combustion optimization at waste incinerators

Maintain efficient or accurate combustion

Product Specifications

ModelOHC-800

Measuring principle

Opt-Sonic method through measurement of light speed and sound speed

Measuring gas (*1)

CH4 basis Paraffinic Hydrocarbon gases as represented by Natural Gas (*2)

(*1) We are capable of measuring many types of gas. Contact us for details.

(*2) Total concentration of interference gases such as N2, O2, CO2, CO etc. contained in a target gas is estimated as less than 20%

Measuring targets

Calorific value (Density / WOBBE index selectable)

Measuring range (*3)

Calorific value : 25.00 – 50.00 MJ/m3 (Gross, 0 degree C, 101.325kPa converted)
Density : 0.500～1.500 MJ/m3 (Specific gravity converted)

(*3) Contact RIKEN KEIKI for the other measuring ranges

Measuring method

Constant-flow-rate gas introduction using external sampling devices

Display

Full-dot LCD (with backlight), 3 color LED lamp

External Output

4-20 mA DC (isolated, source current type) maximum load resistance of 300 Ω / RS-485 communication

Failure alarm

Low flow, Sensor unit abnormality, Low light amount

Failure alarm display

Lamp (red) / Content indication on LCD

Failure alarm contact (*4)

No-voltage contact 1a or 1b De-energize (Energize when alarming) or Energize (De-energize when alarming)
Contact capacity of 2 A, 30 VDC (resistance load)

(*4) Contact setting is adjustable

Self-diagnostic function

FUNCTION CHECK (warm-up or maintenance mode), MAINTENANCE REQUIRED, OUT OF SPECIFICATION

Self-diagnostic display

FUNCTION CHECK, OUT OF SPECIFICATION : Lamp (orange) / Content indication on LCD
MAINTENANCE REQUIRED : Lamp (green) / Content indication on LCD

Self-diagnostic contact
(*4)

FUNCTION CHECK, OUT OF SPECIFICATION : No-voltage contact 1a or 1b
De-energize (Energize when alarming) or Energize (De-energize when alarming) Contact capacity of 2 A, 30 VDC (resistance load)
MAINTENANCE REQUIRED : SSR contact, contact capacity of 20 W, 240 VAC (resistance load)

(*4) Contact setting is adjustable

Power supply

100 – 240 VAC ±10%, 50/60 Hz, max. 18 VA or 24 VDC ±10%, max.
5 W (The setting can be changed to either the AC or DC)

Ingress Protection level

Equivalent to IP66 and IP67

Operation temperature

-20 to＋60 ℃ (-4 to +140 ℉)（ATEX / IECEx）/ -20 to＋57 ℃ (-4 to +134.6 ℉)（Japan EX）

Operation humidity

95%RH or less (no condensing)

Outer dimensions / Weight

Approx. 286 (W) x 453 (H) x 150 (D) mm / Approx. 23 kg (50.7 lbs)

Explosion-proof structure

Flame-proof enclosures (Explosion-proof class: ExdⅡB+H2 T4 ＜Japan EX>/Ⅱ2GExdⅡB+H2T4 ＜ATEX/IECEx＞)