QMA601 Process Humidity Analyzer

Quick response, high-precision humidity analyzer suitable for hazardous environments. The QMA 601 Miller analyzer, which adopts excellent quartz crystal oscillation micro balance technology, has the advantages of high reliability, fast response speed, and high accuracy. Widely used in fields with strict requirements for low humidity environments.

With over 40 years of excellent experience in the field of humidity measurement

Controlling humidity is the most crucial key point in ensuring the safety and efficiency of equipment operation during the production process from upstream to downstream. Michell Instruments is an expert in the field of humidity sensors with over 40 years of excellent experience. During this period, we developed water and hydrocarbon dew point analyzers with a wide range of applications worldwide for the oil, gas, smelting, and power industries. In the industrial field, we have gained rich application experience. Thousands of factories around the world choose to use Michell instruments.

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Fast and reliable range of 0.1~2000 ppmv

The full range is from 1 to 2000ppmv, with a maximum accuracy of 10% of the reading and ± 0.1ppmv when<1ppmv

Three years without maintenance required

• Built in automatic inspection function

Compliant with IECEx, ATEX, TR CU Ex Exd explosion-proof certification, CCSAus explosion-proof certification

• Intuitive color touch sensitive HMI, no special pyrotechnic permit required

14 types of internal alarms

21 types of reserved carrier gases and 3 types of user-defined gases

Quality assurance of Michell instruments: Michell instruments have over 40 years of experience in humidity measurement.

QMA601 Process Humidity Analyzerapplication

Dehydration of ethylene glycol in natural gas

• Drying of molecular sieves in natural gas

• Natural gas transportation and storage

• Catalytic reforming - circulating gas detection

• Ethylene and propylene production

LNG production/re vaporization

QMA601 Process Humidity Analyzerparameter

Quartz crystal oscillator technology with fast response measurement technology

Calibration range * 0.1~700ppmV

Measurement range 0.1~2000ppmV

Accuracy reading ± 10% (1~2000 ppmV)

±0.1 ppmV （ 0.1 ~ 1 ppmV）

Repetitive readings within ± 5% (1~2000 ppmV) ± 0.1 ppmV (0.1~1 ppmV) with a lower limit of 0.1 ppmV

Measurement units: ppmV, ppmW, mg/Nm3, vapor pressure (Pa), dew

point (°C/°F), lb/MMscf

Response speed T63<2 mins T95<5 mins

Self verifying built-in humidity generator as a standard source, traceable to NPL&NIST

Sensitivity of 0.01ppmV or 1% of the reading, whichever is greater

Electrical performance

Power supply 85~264 V AC, 47/63Hz or 24 V DC (ATEX/IECEx)

Only 24 V DC (CSAUS)

Alarm 1 x system alarm, dry contact (FORM C)

3 x process alarm, various parameters can be selected, no voltage conversion (FORM C)

Analog signal 2 x 4-20 mA or 1-5 V (optional)

4-20 mA maximum load 500 Ω

1-5 V minimum load 1M Ω

Digital Communication RS485 ModBus RTUModbus TCP

Data recording is done through an analyzer (with limited values) or application software

Display 7 "color LCD touch screen

Electrical connection M20 cable interface

working conditions

Inlet pressure 3 barg (43.5 psi)

Exhaust pressure 2 barg (29 PSI)

Sample gas flow rate 300ml/min total flow

Sample gas temperature 0 to+100 ° C (+32 to+212 ° F)

Working environment

Only analyzer

Analyzer with sampling system

+5~+45 ° C (+41~+113 ° F) up to 90% RH

-20~+55 ° C (-4~+131 ° F) up to 95% RH

Configure heaters, thermostats, or casing cooling as needed to ensure

The internal temperature is between+5~+45 ° C (+41~+113 ° F)

mechanical properties

Type GUB Fireproof Exd

shell

Lid&Body

Glass window

Cast aluminum shell LM25 (EN AC-42000), less than 0.6 magnesium

Heat resistant explosion-proof, polyester coating, IP66, NEMA 4

Gas interface 1/8 "NPT

Weight 35kg (77lb) without sampling system

Sampling system casing made of 316L stainless steel

certification

Hazardous Area Certification ATEX/IECEx/CSAc/CSAus

TC-TRII 2 GD Ex d IIB+H2 T6 Gb, Ex tb IIIC T85°C Db, Tamb -40°C ~ +60°C

Ex d IIB+H2 T6 Gb, Ex tb IIIC T85°C Db, Tamb -40°C ~ +60°C

Class I, ZONES, Ex d IIB+H2 T6 Gb, Tamb -20°C ~ +55°C

Class I, Div 1, Group BCD T6, Tamb -25°C ~ +55°C

1Ex d IIB+H2 T4 Gb X, 1Ex tb IIIC 130°C Db X &

1Ex d IIB+H2 T3 Gb X, 1Ex tb IIIC 195°C Db X