MIS Probe 2
Aluminum Oxide
Trace Moisture ProbeApplications

This Panametrics aluminum oxide moisture sensor probe
measures moisture concentration in gases and nonaqueous liquids from trace to ambient levels. It is designed
to be used with the Panametrics Moisture.IQ analyzer and thePM880 portable hygrometer for industries including:• Petrochemical• Natural gas• Industrial gas• Semiconductor• Furnace gas/heat treatingFeatures• Intrinsically safe

• Ambient to ppb moisture measurement: 16-bit resolution• Three function capability with moisture sensor andoptional built-in temperature and pressure sensors• Nonvolatile calibration data storage• Calibrations traceable to National Institute of Standards
and Technology (NIST) or National Physical Lab U.K. (NPL)• Requires only twisted pair cabling, allowing probe to belocated up to 3000 ft (914 m) from analyzer• Threaded and VCR mount configurations• Power generation• Air dryer• Pharmaceutical• Aerospace

Panametrics Hygrometer Systems
and Moisture Probes

Panametrics aluminum oxide moisture probes have set thestandard of performance and value in industrial moisturemeasurement for more than 50 years.
In use, the Moisture Image Series probe is coupled toPanametrics hygrometer consoles by an interconnecting
cable. Ease of use, wide measurement range and rigorous
calibration standards make these systems the preferredchoice for industrial moisture measurement worldwide.

Built-in pressure andtemperature measurement

Accurate determination of many moisture measurement
parameters requires knowledge of the process temperatureand pressure. The inconvenience and limitations associatedwith installing and using separate temperature and pressure
sensors have been eliminated, with both capabilities
being built directly into the Moisture Image Series probe.
An NTC thermistor to measure temperature from –22°F
to 158°F (–30°C to 70°C), and a choice of five solid-statepiezoresistive transducers to measure pressures up to 5000
psig (345 bar), are available.

2Temperature and pressure input data are used by Moisture.
IQ analyzers and the PM880 portable hygrometer todetermine parameters such as ppm, lbs/mmSCF andrelative humidity.

MIS Electronics Module

The real power of the MIS probe comes from an electronic
module that is attached to the moisture sensor probe. The
built-in microprocessor provides 16-bit resolution, a realperformance enhancement, allowing it to detect parts perbillion (ppb) changes in moisture concentration. In addition,
it continuously monitors and compensates the electronics toensure long-term stability.
For convenience, moisture probe calibration data is stored in
nonvolatile EEPROM, so data entry is automatic and safe frompower outage.
The Moisture Image Series probe is intrinsically safe,
saving the expense and installation problems associatedwith explosion-proof housings, purges, or external zener
requirements of IEC/Zone 0 areas.

3

Rigorous calibration standards
traceable to the NIST/NPL

The aluminum oxide sensor of each MIS probe is individuallycalibrated in one of the world’s most advanced moisturecalibration facilities. Developed over several decades, thisfacility generates precisely known moisture concentrations,traceable to the NIST/NPL, to which each sensor is exposed
during the calibration process.
All data is gathered and stored by a dedicated computer
system. Calibrations are repeated over a period of many
months to ensure the stability of each individual moistureprobe. Only those probes that meet GE’s demanding
specifications for accuracy and stability are shipped tocustomers.

Installation flexibility

The Moisture Image Series probe is designed to be locatedat the process, exactly where the measurement is needed.
The sensor has a wide temperature operating range andcan work in process pressures from vacuum up to 5000 psig(345 bar). No minimum flow rate is required. For additional
flexibility, the probe can be located up to 3000 feet (0.9 km)
from the analyzer, connected by inexpensive, unshielded,cable (AWG 22). As a result, the probe can be placed in theideal location, even in a large plant, without the cost, delays
and installation problems associated with special cabling.

45Specifications
Moisture Sensor
Intrinsic safety

Intrinsically safe when connected to a Panametrics Moisture.
IQ analyzer, PM880 portable hygrometer or intrinsically safe
barriers in accordance with the user’s manual. Moisture
Image Series probe: BAS01ATEX1095
II 1 G Ex ia IIC T4. (–20°C to +80°C) and CSA C US Class I,
Division 1, Groups A,B,C&D T4, LR44204-23

European compliance
Complies with EMC Directive 2004/108/EC and PED 97/23/EC
for EN <25Type
Aluminum oxide moisture sensor probeCalibration
Each probe is individually computer calibrated against
known moisture concentrations, traceable to nationalstandards.

Dew/frost point calibration ranges• Overall capability: 140 to -166°F (60 to –110°C) by request• Standard calibration range: 50 to -112°F (10 to –80°C)
with data provided from 68 to -166°F (20 to -110°C)• Ultralow calibration range: -58 to -148°F (-50 to –100°C)
with data to -166°F (-110°C)

Accuracy

MIS Probe/Analyzer Separation• 3000 ft (0.9 km) maximum recommended length(consult factory for longer distances)

MIS Probe/Analyzer Compatibility• moisture.IQ• PM880 portable hygrometer

MIS Probe/Analyzer Cable• Unshielded, twisted pair, AWG 22

Built-In Temperature Sensor
TypeNonlinear NTC thermistor (resultant temperature
linearized by microprocessor)

Operating range– 22° to 158° F (–30° to 70°C)

Accuracy±0.9°F (±0.5°C) overall

Response time (maximum)
One second in well stirred oil or 10 seconds in still air for a 63%
step change in increasing or decreasing temperature

Built-in Pressure Sensor• ±3.6°F (±2°C) above -148°F (–100°C)

Type• ±5.4°F (±3°C) below -148°F (-100°C)

Solid-state/piezoresistive

Repeatability

Available ranges• ±0.4°F (±0.2°C) above -148°F (–100°C)• 30 to 300 psig (3 to 21 bar)

• ±0.9°F (±0.5°C) below -148°F (–100°C)• 50 to 500 psig (4 to 35 bar)Temperature• 100 to 1000 psig (7 to 69 bar)

• Operating temperature: -4°F to +140°F (–20°C to +60°C)• Storage temperature: -22°F to +158°F (–30°C to +70°C)

Operating pressure• 5 μm Hg to 5000 psig (345 bar)• 300 to 3000 psig (21 to 207 bar)
• 500 to 5000 psig (35 to 345 bar)

Accuracy±1% of full scale

Limited by optional pressure sensor – see pressure sensor ranges.

Pressure rating

Flow range

Three times the span of the available range to a maximumof 7500 PSIG (518 Bar(g))• Gases: Static to 10,000 cm/s linear velocity at 1 atm• Liquids: Static to 10 cm/s linear velocity at density of 1 g/cc

67Panametrics, a Baker Hughes Business, provides solutions in
the toughest applications and environments for moisture,oxygen, liquid and gas flow measurement. Experts in flaremanagement, Panametrics technology also reduces flareemissions and optimizes performance.
With a reach that extends across the globe, Panametrics’
critical measurement solutions and flare emissions
management are enabling customers to drive efficiency
and achieve carbon reduction targets across criticalindustries including: Oil & Gas; Energy; Healthcare; Water andWastewater; Chemical Processing; Food & Beverage andmany others.
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