The superior analytical solution for your High-Brightness LED needs

The ALOHA+ H2O advances moisture detection in ammonia (NH3) to unprecedented levels. The analyzer provides specialty gas and High-Brightness LED makers with the exceptional detection limits, accuracy, reliability, speed of response and ease of operation that Tiger Optics customers have come to expect. LED manufacturers rely on Tiger Optics’ family of proven Continuous-Wave Cavity Ring-Down Spectroscopybased moisture sensors to ensure the ammonia process gas is of the high quality necessary to produce High Brightness LEDs.

The cost effective analyzer is quick to install, easy to use and effortless to maintain. There are no offline periodic sensor maintenance procedures, no span calibrations, no purifier replacement and no pump rebuilds required. The ALOHA+ H2O analyzer is fully self-calibrating and the “bright” choice for your detection needs!


Designed for trace level moisture analysis in ammonia, the ALOHA+ H2O offers:

  • 3 parts per billion (ppb) detection capability in ammonia (NH3) and sub-ppb in inert matrices
  • Rapid response time
  • Wide dynamic range
  • Absolute and calibration-free measurement technology
  • Extremely low cost of ownership
  • User-friendly touchscreen and remote communication


  • Research & Development
  • UHP Ammonia & High-Brightness LEDs


Detection and Matrix Range LDL (3σ) Precision (1σ) @ zero
H2O in NH3 0 – 20 ppm 3 ppb 1 ppb
H2O in N2 0 – 6 ppm 0.5 ppb 0.2 ppb
H2O in He 0 – 3 ppm 0.3 ppb 0.1 ppb
H2O in Ar 0 – 4 ppm 0.4 ppb 0.15 ppb


Operating range See Detection Capability table
Detection limit (LDL, 3σ/8h) See Detection Capability table
Precision (1σ, greater of) ± 0.75% or 1/3 of LDL
Accuracy (greater of) ± 4% or LDL
Speed of response < 5 minutes to 95%
Environmental conditions 10°C to 40°C, 30% to 80% RH (non-condensing)
Storage temperature -10°C to 50°C
Gas Handling System and Conditions*
Wetted materials 316L stainless steel, 10 Ra surface finish
Gas connections 1/4″ male VCR inlet and outlet
Leak tested to 1 x 10-9 mbar l / sec
Inlet pressure 10 – 125 psig (1.7 – 9.6 bara)
Outlet pressure < 2 Torr (2.7 mbar)
Flow rate Up to 1.8 slpm (gas dependent)
Sample gases Ammonia (NH3) and inert matrices
Gas temperature Up to 60°C
Dimensions, H x W x D
Standard sensor (incl. shutoff valves) 8.73″ x 8.57″ x 26.4″ (222 mm x 218 mm x 670 mm)
Sensor rack (fits up to two sensors) 8.73″ x 19.0″ x 26.4″ (222 mm x 483 mm x 670 mm)
Standard sensor 34 lbs (15.4 kg)
Electrical and Interfaces
Platform Max series analyzer
Alarm indicators 2 user programmable, 1 system fault, Form C relays
Power requirements 90 – 240 VAC, 50/60 Hz
Power consumption 40 Watts max.
Signal output Isolated 4–20 mA per sensor
User interfaces 5.7″ LCD touchscreen, 10/100 Base-T Ethernet
USB, RS-232, RS-485, Modbus TCP (optional)
Data storage Internal or external flash drive
Certification CE Mark
U.S. Patent #7,277,177
*Vacuum source required


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