ZS8100-H2O extractive TDLAS process moisture analyzer — front view
In-line Process
ZS8100-H2O extractive TDLAS moisture analyzer — angled view
ZS8100-H2O TDLAS moisture analyzer — measurement cell detail
ZS8100-H2O TDLAS moisture analyzer — terminal and I/O detail
ZS8100-H2O TDLAS moisture analyzer — installed configuration
Industrial Series: ZS8100-H2O

Process Moisture Analyzer

TDLAS-based trace moisture measurement for natural gas and process applications

Range
0.1 ppm – 30 %vol H₂O
Accuracy
±1 ppm or ±1% of reading
Response
<2s T90
Output
4-20mA, Modbus, HART
Review process moisture duty Request ZS8100-H2O datasheet
Product Overview

Overview

The ZS8100-H2O uses tunable diode laser absorption spectroscopy for real-time moisture measurement from sub-ppm to percent levels — suited for natural gas dehydration monitoring, process gas drying verification, and combustion optimization.

Key Highlights
  • Tunable diode laser optical measurement
  • Auto-validation with internal reference cell
  • Heated optical path prevents condensation
  • Configurable dual-range (trace + percent)
  • ATEX Zone 1 hazardous-area enclosure option (zone/gas-group per certificate)
  • Remote diagnostics via Modbus TCP / OPC-UA
  • TDLAS H₂O capability is shared with the bench-top TDLAS form factor and the OEM TDLAS laser module (both by project review) — same physics, different form factors

Full Technical Specifications

Key Performance

Key Performance metrics for ZS8100-H2O
Metric Value Status
Range 0.1 ppm – 30 %vol H2O confirmed
Accuracy ±1 ppm or ±1% of reading confirmed
Response <2s T90 confirmed
Output 4-20mA, Modbus, HART confirmed

Specifications

Specifications for ZS8100-H2O
SpecificationValue
Range0.1 ppm – 30 %vol H₂O
Accuracy±1 ppm or ±1% of reading
Response<2s T90
Output4-20mA, Modbus, HART

Deployment Environments

Common process environments where this model is evaluated.

Natural gas dehydration (TEG/mol sieve)
Process gas drying verification
Flue gas moisture for heat rate optimization
Semiconductor UHP gas monitoring

Certification Scope

Standards are listed with scope and status so engineering review can verify the applicable enclosure, area, and safety case.

Certification scope matrix for ZS8100-H2O
Standard Scope Variant Status Document
CE CE conformity self-declared against harmonized standards (LVD / EMC) Project variant self-declared Declaration of Conformity on request
ATEX Hazardous-area enclosure option; ATEX zone and gas-group confirmed per certificate Project variant conditional Certificate extract on request when in order scope
CE ATEX

Request Documentation

Request technical datasheets, user manuals, certificates, and application notes for this model.

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Evidence Notes

application-note

TDLAS moisture architecture for process and purity gas duty

The application set places this analyzer in natural-gas dehydration, process drying, flue-gas moisture, and UHP gas monitoring. The architecture depends on TDLAS H2O absorption, heated optical-path control, and matrix review where CO2, CH4, or saturated water vapor can affect the selected line.

Technical / Engineering Details

Technical & Engineering Details

Secondary engineering detail — expand each topic for the full measurement, envelope, sample-system, calibration, and maintenance information.

01 Measurement Principle and Limits

How the measurement is bounded

TDLAS measures H2O absorption on a selected laser line for trace-to-percent moisture monitoring in process and purity gas applications.

Requires

  • Heated optical path and sample path control to avoid condensation
  • Matrix review for CO2-rich, CH4-rich, or hydrocarbon-rich process gas
  • Auto-validation reference cell checks when used for long-running online duty

Interferents and Limits

  • CO2 and CH4 spectral overlap can require matrix-specific line selection or compensation
  • High-moisture conditions near saturation can exceed the selected absorption range
  • Condensation in the optical path changes the measurement basis
  • Sample below dew point without heated conditioning
  • Moisture above the declared 30 %vol range
  • Process pressure and ambient limits are not stated in the current published specification
02 Operating Envelope

Use these limits as selection inputs, then confirm sample condition, ambient exposure, and materials before quotation.

Dew Point
dew-point duty is application-specific; the current specification states a heated optical path to prevent condensation
Outside This Envelope
  • Condensing sample without heated line or heated optical-path review
  • Moisture above the declared 0.1 ppm – 30 %vol H2O range
  • CO2-rich or CH4-rich gas without spectral-overlap review
03 Sample System Boundary

Sampling mode, conditioning components, and exclusions define where the analyzer responsibility ends and the sample system begins.

Sampling Mode
extractive
Boundary Components
  • heated optical path
  • internal reference cell
  • extractive sample line
  • ZS-SCS-800 heated sampling system when required
Compatible Conditioning
ZS-SCS-800
ZS-SCS-800 High-Temperature Heated Sampling System
Boundary Exclusions
  • Unheated wet sample lines for flue gas or saturated process gas duty
04 Calibration & Validation site-specific

Calibration method, interval, and traceability are shown only when structured data is available.

Zero / Span Method

Auto-validation with internal reference cell is listed in the features; full zero/span sequence is not stated

Interval

Not stated in the current published specification

05 Maintenance & Spares site-specific

Tasks, consumables, and access items are shown only when structured maintenance data is available.

Service Tasks
  • Verify heated optical-path and sample-line operation before moisture-critical duty
  • Run internal reference-cell validation checks according to the site QA schedule
  • Review sample conditioning when switching between trace, percent, natural-gas, and flue-gas applications
Consumables
  • Sample-line filter or conditioning parts when configured with extractive sampling
Selection Questions

Frequently Asked Questions

What does the ZS8100-H2O measure, and how?

The ZS8100-H2O uses TDLAS — tunable diode laser absorption spectroscopy — to measure H₂O absorption on a selected laser line for trace-to-percent moisture monitoring in process and purity gas applications. The published range is 0.1 ppm – 30 %vol H₂O with ±1 ppm or ±1% of reading accuracy and a <2s T90 response.

What sample conditioning does the ZS8100-H2O require?

It needs a heated optical path and sample-path control to avoid condensation, and runs in an extractive configuration that includes an internal reference cell and an extractive sample line. The ZS-SCS-800 heated sampling system is the compatible conditioning path when required. Unheated wet sample lines for flue gas or saturated process gas duty fall outside the sample-system boundary.

Which gases or conditions can interfere with the moisture reading?

CO2 and CH4 spectral overlap can require matrix-specific line selection or compensation, so a matrix review is recommended for CO2-rich, CH4-rich, or hydrocarbon-rich process gas. High-moisture conditions near saturation can exceed the selected absorption range, and condensation in the optical path changes the measurement basis.

What duty falls outside the ZS8100-H2O operating envelope?

Outside the envelope: a condensing sample without a heated line or heated optical-path review; moisture above the declared 0.1 ppm – 30 %vol H₂O range; and CO2-rich or CH4-rich gas without a spectral-overlap review. Process pressure and ambient limits are not stated in the current published specification and should be confirmed before quotation.

How is the ZS8100-H2O calibrated and validated?

Auto-validation with an internal reference cell is listed in the feature set; the full zero/span sequence is not stated, and the calibration interval is not stated in the current published specification. Validation cadence is therefore site-specific and should follow the site QA schedule.

What approvals does the ZS8100-H2O carry?

CE is self-declared for this model against the harmonized LVD / EMC standards. An ATEX Zone 1 hazardous-area enclosure is available as an option, with the Ex marking, zone and gas-group scope confirmed per certificate — so the applicable enclosure and area classification should be confirmed against the installation during engineering review before order commitment.

Review ZS8100-H2O against site conditions

Send gas range, sample temperature, pressure, moisture, and certification needs before final model selection.

Category Industry applications Technology topic Gas selector
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