DGA Comparison Chart: Multi Gas
How industry leading Dissolved Gas Analysis (DGA) monitors compare on gases monitored, diagnostic tools, installation and maintenance, and system specifications. Dynamic Ratings supports communication to all major DGA monitors. We recognize that DGA monitors have different advantages and no one product would be optimal for all customers.
SupportedBlank: not supported or not listed
| Feature | DobleCalisto 5 | DobleCalisto 9 | DobleCalisto R9 | VaisalaOPT100 Optimus™ | General ElectricKelman Transfix | ServeronTM8 | MTE Meter Test EquipmentHydrocal 1005 | MTE Meter Test EquipmentHydrocal 1008 | MTE Meter Test EquipmentHydrocal 1009 | CamlinTotus G5 | CamlinTotus G9 | HitachiCoreSense M10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gases monitored | ||||||||||||
| Hydrogen H2 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Methane CH4 | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes |
| Acetylene C2H2 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Ethylene C2H4 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Ethane C2H6 | No | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| Carbon monoxide CO | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Carbon dioxide CO2 | No | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| Nitrogen N2 | No | Yes | Yes | No | Yes1 | Yes | No | No | No | No | Yes1 | No |
| Oxygen O2 | No | Yes | Yes | No | Yes | Yes | No | No | Yes | No | Yes | No |
| Other information | ||||||||||||
| Moisture | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Fluid compatibility | Mineral oil, silicone and natural & synthetic esters | Mineral oil, silicone and natural & synthetic esters | Mineral oil, silicone and natural & synthetic esters | Mineral oil | Mineral oil and natural esters | Mineral oil | Mineral oil and synthetic esters | Mineral oil and synthetic esters | Mineral oil and synthetic esters | Mineral oil | Mineral oil, silicone and natural & synthetic esters | Mineral oil, silicone and natural & synthetic esters |
| Diagnostic tools through Dynamic Ratings hardware: gases | ||||||||||||
| Duval 1 | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes |
| Duval 3a silicone | Yes | Yes | Yes | No | No | No | No | Yes | Yes | No | Yes | Yes |
| Duval 3b FR3 | Yes | Yes | Yes | No | Yes | No | No | No | No | No | Yes | Yes |
| Duval 3c Midel | Yes | Yes | Yes | No | No | No | No | Yes | Yes | No | Yes | Yes |
| Duval 3d BioTemp | Yes | Yes | Yes | No | Yes | No | No | No | No | No | Yes | No |
| Duval 4 low temp | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes |
| Duval 5 high temp | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes |
| Duval 6 FR3 low temp | Yes | Yes | Yes | No | Yes | No | No | Yes | Yes | No | Yes | Yes |
| Duval 7 FR3 low temp | Yes | Yes | Yes | No | Yes | No | No | Yes | Yes | No | Yes | Yes |
| Duval Pentagon 1 | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| Duval Pentagon 2 | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| IEEE conditions | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes |
| Diagnostic tools through Dynamic Ratings hardware: ratios | ||||||||||||
| IEC transformer | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes |
| Rogers IEEE | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| Doernenburg | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| CO2/CO | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| C2H4/C2H2 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes |
| IEEE key gas | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes |
| Duval 2 OLTC type I | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| Duval 2a OLTC type IIa | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| Duval 2b OLTC type IIb | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| Duval 2c OLTC type IIc | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| Duval 2d OLTC type IId | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| Duval 2e OLTC type IIe | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| OLTC heating gas | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
| Additional advantages when used with Dynamic Ratings | ||||||||||||
| Dynamic Ratings certified to install and service | Yes | Yes | Yes | Yes | No | No | No | No | No | No | No | No |
| Single point support from Dynamic Ratings | Available | Available | Available | Available | No | No | No | No | No | No | No | No |
| Installation and maintenance | ||||||||||||
| Consumables | Calibration & carrier gas | Calibration & carrier gas | No consumables | No consumables, no maintenance | No consumables | Calibration & carrier gas | No consumables | No consumables | No consumables | No consumables | No consumables | No consumables |
| Recommended maintenance timeline | Visual inspection every 12 months. Carrier gas and calibration gas replacement every 48 months | Visual inspection every 12 months. Carrier gas and calibration gas replacement every 48 months | Visual inspection every 12 months | No regular maintenance required; expected operating life >15 years | 5 years or 50,000 measurements | Not available | Not required | Not required | Not required | Minor maintenance at 5 years, major maintenance at 10 years | Minor maintenance at 5 years, major maintenance at 10 years | 10 years |
| Warranty | 30 months from shipping date | 30 months from shipping date | 30 months from shipping date | 24 months | 18 months | 18 months from shipment or 12 months | 24 months | 24 months | 24 months | Not available | Not available | 36 months |
| Installation mounting (length × width × depth) | 489 × 502 × 337 mm (19 × 19.8 × 13.3 in), 35 kg (75 lb), stainless steel enclosure, connected to separate inlet and outlet transformer valves | 489 × 502 × 337 mm (19 × 19.8 × 13.3 in), 35 kg (75 lb), stainless steel enclosure, connected to separate inlet and outlet transformer valves | 721 × 670 × 343 mm (28.4 × 26.26 × 13.5 in), 57 kg (125 lb), painted SS, NEMA 4X, IP66 | 1630 × 675 × 453 mm (64 × 27 × 18 in), NEMA 4 IP66 enclosure | 900 × 600 × 389 mm (35 × 24 × 15 in), 90 kg (198 lb) | 559 × 508 × 284 mm (22 × 20 × 11.2 in), 29.5 kg (65 lb), NEMA 4X IP66 enclosure | 263 × 263 × 328 mm (10.4 × 10.4 × 12.9 in), fits on 1.5 in bore ball or gate valve with NPT or ISO 228 thread | 263 × 263 × 328 mm (10.4 × 10.4 × 12.9 in), fits on 1.5 in bore ball or gate valve with NPT or ISO 228 thread | 263 × 263 × 328 mm (10.4 × 10.4 × 12.9 in), fits on 1.5 in bore ball or gate valve with NPT or ISO 228 thread | 730 × 853 × 398 mm (28.7 × 33.6 × 15.7 in), 54 kg (119 lb), IP56 enclosure | 730 × 853 × 398 mm (28.7 × 33.6 × 15.7 in), 54 kg (119 lb), IP56 enclosure | Measurement head 392 × 264 × 158 mm, NEMA 4X IP67 |
| System description | ||||||||||||
| Type of technology | Gas chromatography | Gas chromatography | Differential photoacoustic spectroscopy, TCD for H2, fluorescent dye sensor for O2, pressure sensor for N2, capacitive H2O sensor | Patented optical NDIR spectral scanning sensors. Solid state hydrogen and moisture sensors immersed directly in oil flow. | Photo-acoustic spectroscopy + solid state sensors for H2 and O2 | Gas chromatography | Optical NIR spectroscopy + solid state sensor for H2 | Optical NIR spectroscopy + solid state sensor for H2 | Optical NIR spectroscopy + solid state sensor for H2 | NDIR + solid state sensors for H2 | Photo-acoustic spectroscopy (PAS) + solid state sensors for H2 and O2 | Fourier transform mid-infrared spectroscopy (FTIR) + solid state sensors for hydrogen and moisture |
| Calibration verification | Uses NIST traceable gas standard, once per day | Uses NIST traceable gas standard, once per day | Autocalibration using water vapor | Patented autocalibration reference cycle | Uses ambient air | Uses NIST traceable gas standard | DGA adjustment tool | DGA adjustment tool | DGA adjustment tool | Permanent calibration at factory. Calibrated verification gas check kit | Permanent calibration at factory. Calibrated verification gas check kit | Permanently calibrated at factory. Integrated frequency standard. |
| Accuracy2 | H2: ±(LDL+2%) CO: ±(LDL+2%) CH4: ±(LDL+2%) C2H2: ±(LDL+2%) C2H4: ±(LDL+2%) H2O: ±2 ppm | H2: ±(LDL+2%) CO: ±(LDL+2%) CO2: ±(LDL+2%) CH4: ±(LDL+2%) C2H2: ±(LDL+2%) C2H4: ±(LDL+2%) C2H6: ±(LDL+2%) O2: ±(LDL+2%) N2: ±(LDL+2%) H2O: ±2 ppm | H2: ±(LDL+5%) CO: ±(LDL+3%) CO2: ±(LDL+3%) CH4: ±(LDL+3%) C2H2: ±(LDL+3%) C2H4: ±(LDL+3%) C2H6: ±(LDL+3%) O2: ±(LDL+10%) N2: ±(LDL+15%) H2O: ±2 ppm | Methane, ethane, ethylene, CO, CO2: ±10 ppm or 10% of reading Acetylene: ±2 ppm or 10% of reading Hydrogen: ±25 ppm or 20% of reading | Not available | ±5%, varies by gas measured | C2H4: ±10 ppm or 10% of reading C2H2: ±2 ppm or 10% of reading CO: ±10 ppm or 10% of reading H2: ±25 ppm or 20% of reading | CxHx except C2H2: ±10 ppm or 10% of reading C2H2: ±2 ppm or 10% of reading CO, CO2: ±10 ppm or 10% of reading H2: ±25 ppm or 20% of reading | CxHx except C2H2: ±10 ppm or 10% of reading C2H2: ±2 ppm or 10% of reading CO, CO2: ±10 ppm or 10% of reading H2: ±25 ppm or 20% of reading | H2: ±5 ppm or 10% of reading CH4: ±20 ppm or 10% of reading C2H4: ±5 ppm or 5% of reading C2H2: ±3 ppm or 5% of reading CO: ±10 ppm or 10% of reading | ±5% or ±LDL, whichever is greater | ±5%, varies by gas measured |
| Repeatability2 | H2: ±(LDL+5%) CO: ±(LDL+5%) CH4: ±(LDL+5%) C2H2: ±(LDL+5%) C2H4: ±(LDL+5%) H2O: ±3 ppm | H2: ±(LDL+5%) CO: ±(LDL+5%) CO2: ±(LDL+5%) CH4: ±(LDL+5%) C2H2: ±(LDL+5%) C2H4: ±(LDL+5%) C2H6: ±(LDL+5%) O2: ±(LDL+15%) N2: ±(LDL+15%) H2O: ±3 ppm | H2: ±(LDL+10%) CO: ±(LDL+10%) CO2: ±(LDL+10%) CH4: ±(LDL+10%) C2H2: ±(LDL+10%) C2H4: ±(LDL+10%) C2H6: ±(LDL+10%) O2: ±(LDL+15%) N2: ±(LDL+20%) H2O: ±3 ppm | Methane, ethane, ethylene, CO, CO2: ±10 ppm or 5% of reading Acetylene: ±1 ppm or 10% of reading Hydrogen: ±15 ppm or 10% of reading | Not available | <1%, varies by gas | Not available | Not available | Not available | H2, CH4 and CO: 10% or LDL C2H4 and C2H2: 5% or LDL over 10 measurements | 1% over 10 measurements | Hydrogen: ±10% All other gases: ±0.5% |
| Power requirements | 100–240 VAC +10% 100–220 VDC +10% 50/60 Hz | 100–240 VAC +10% 100–220 VDC +10% 50/60 Hz | 100–240 VAC −15% +10%, 50–60 Hz, 1 phase, 520 VA. Test report available for 240 VAC +15% | 100–240 VAC, 50/60 Hz ±10% | 90–250 VAC, 47/63 Hz | 115 VAC or 230 VAC ±15%, 50/60 Hz | 88–276 VAC, 50/60 Hz, option for 88–390 VDC | 88–276 VAC, 50/60 Hz, option for 88–390 VDC | 88–276 VAC, 50/60 Hz, option for 88–390 VDC | 90–250 VAC, 47/63 Hz 110–220 VDC | 90–250 VAC, 47/63 Hz 110–220 VDC | 100–240 VAC, 50/60 Hz |
| Gas extraction method | Low velocity pump continuously circulates oil past gas-permeable membrane tubes | Low velocity pump continuously circulates oil past gas-permeable membrane tubes | Low velocity pump continuously circulates oil past gas-permeable membrane tubes | Patented vacuum gas extraction driven by magnetic gear pump, drawing a sample every 1–1.5 hours | Oil pump turns on as needed to draw samples, head space gas extraction | Gas-permeable nanotubes. Pump runs continuously | Head space | Head space | Head space | Oil pump turns on as needed to draw samples, head space gas extraction | Oil pump turns on as needed to draw samples, head space gas extraction | Passive equilibrium through gas-permeable capillary tube |
- Calculation based on oxygen measure.
- Accuracy noted is the accuracy of the detectors during the calibration process. Dissolved gas in liquid measurement accuracy may also be affected by sampling and/or fluid type. Consult with the manufacturer of the DGA monitor for further details.
Specifications subject to change without notice. Last updated August 5, 2025.