Model DX Chilled Mirror Hygrometer Sensor

The Model DX primary method chilled mirror dew/ frost point sensor is a direct insertion hygrometer sensor with an integral PRT temperature sensor, wide operating range and superior temperature stability. The new DX can be inserted into a gas process stream or used to monitor the local environment. With its integrally mounted temperature sensor, a single penetration reduces installation cost …


  • Direct insertion expands Edgetech Instruments sensor choices for easy installation
  • Integrally mounted PRT temperature sensor reduces installation cost and improves RH accuracy
  • Active sensor temperature compensation and isolation eliminate drift
  • Compact design reduces space needed for installation
  • Integrated micro aspirator option for faster response in static environments
  • Integrated filter options for use in dirty environments

Model X3 Chilled Mirror Hygrometer Sensor

The Edgetech Instruments Model X3 chilled mirror sensor is specifically designed to measure the Dew/Frost point in demanding process and laboratory applications. It is available in multiple configurations to accurately measure very low dew/frost points in aggressive background gases. The Model X3 sensor’s minimized sample cavity results in rapid dry-down times, fast response and quick detection of upset process conditions. …


  • Chemically resistant sensor housing and mirror eliminate sensor failures when measuring dew/frost point in aggressive background gases
  • Chamber design and high efficiency heat exchanger result in the ability to measure very low frost points
  • Hinged cover plate allows easy access to the mirror for cleaning and inspection
  • Reduced cavity sample chamber speeds sample sweeping resulting in rapid dry-down after exposure to high moisture levels
  • Rugged, industrial electrical connectors and easy access slim line signal harness simplify installation and maintenance
  • Best in class range to -95°C frost point

DewTech 390 Low Dewpoint Hygrometer

The Edgetech Instruments DewTech 390 is a precision dew/frost point hygrometer that measures extremely low frost points or trace moisture in a variety of background gases. Based on the primary method chilled mirror sensor technique, it is delivered with a NIST traceable calibration certificate and is certified in an ISO/IEC 17025 accredited calibration laboratory. At the core of the DewTech …


  • A precision laboratory grade hygrometer system that measures an extremely wide range of dew/frost points in gases from as low as –90°C frost point to as high as +20°C dew point
  • Based in the primary method chilled mirror technique with all the attributes, features and certifications needed for laboratory use at an affordable price
  • Ideal for metrology labs, scientific research and process measurements or any application where high precision measurement of dew/frost point over a wide range with fast response and high stability are required
  • For peak efficiency the sensor’s performance is maximized by an integral cryo-cooling system
  • The DewTech 390 is supported in the USA in a modern, ISO 9001 registered facility with ISO/IEC 17025 accredited calibration laboratory and is delivered with a UKAS traceability certificate.
PDM75-X3 Portable

PDM75-X3 Portable, Industrial Duty Hygrometer

The Model PDM75-X3 is portable dewpoint hygrometer that integrates the accuracy and reliability of the Edgetech Instruments chilled mirror sensor with the convenience and ruggedness required for field use. It features drift-free accuracy, NIST traceability, low maintenance, high durability and ease of use in a portable package. The Model PDM75-X3 has all the standard features of the Edgetech Instruments DewMaster …


  • Based on the Edgetech Instruments DewMaster Hygrometer
  • Chemically resistant, primary method dew/frost point sensor
  • Drift free and certified against NIST traceable standards
  • Best in class air cooled temperature depression
  • Wide measurement ranges from -70°C to +70°C dew/frost point temperature
  • Locally or remotely mounted sensor options
  • Automatic Balance Control for optics contaminants correction
  • Rugged, high impact portable case
  • Multiple interfaces
  • Sampling options for positive or negative pressure
Sentry Compressed Air Monitoring and Alarm System Data Sheet

SENTRY Compressed Air Monitor and Alarm

The Edgetech Instruments SENTRY turn-key measurement and alarm system features a smart multi-sense probe that continuously monitors the dew/frost point and pressure of compressed air systems to detect compressor or dryer failures and system pressure leaks. The SENTRY features a strobe lamp and pulsing horn plus an alarm relay contact that activate when a programmable, low pressure or high dew/frost …


  • Detects upset conditions in compressed air systems
  • Constantly monitors pressure and dew/frost point temperature
  • Strobe lamp and pulsing audible alarms for low pressure or high dew/frost point alert
  • Displays dew/frost point and pressure on panel meter
  • NIST traceable calibration certificate
  • Field replaceable Smart Sensor Tip
  • Alarm relay and 4 to 20 mA outputs
  • Complete system, ready for installation
PPM1 Trace Moisture Analyzer

PPM1 Trace Moisture Analyzer

The PPM1 uses an electrolytic, phosphorus pentoxide sensor in combination with a proprietary semipermeable diffusion membrane to measure trace moisture as parts per million by volume (ppmv) water vapor or dew/frost point in dry inert gases. The PPM1 is modular and may be mounted remotely. It is packaged in an IP66/67, NEMA 4 enclosure and comes complete with two FORM …


  • Trace moisture transmitter for monitoring moisture levels in dew/frost point and ppmv
  • Wide measurement range of 0.1 to 1250 ppmv covers many industrial and research applications
  • Fundamental measurement principle traceable to NIST standards
  • Packaged in an IP66/67, NEMA 4 enclosure with two alarm relays, two analog outputs and a RS-232 bi-directional serial interface
  • Optional VCR sample connections
  • For dry inert gas applications

HP125 Series Multi-Sense Humidity Probe

The HP125 Multi-Sense Humidity Probe is a cost effective, easy to use solution to many industrial and laboratory measurement and control applications. The HP125 probe exploits the latest advancements in polymer humidity sensing technology and compact electronic circuitry. It is designed to continuously measure up to 4 measurement parameters using a single intelligent sensor tip including RH%, calculated Dewpoint, Temperature …


  • Single, cost-effective probe continuously measures up to 4 parameters including relative humidity, dewpoint, temperature and pressure
  • The sensor can be replaced in seconds and automatically synchronizes with the HP125 probe
  • Can be used stand-alone or in combination with the HP125-DCM or with the SENTRY series of compressed gas alarm modules
  • No need to send the probe for calibration service off-site
  • Each new sensor comes with a NIST traceable calibration certificate
  • For industrial and laboratory measurement and control applications

DPS3 Heated Dewpoint System

The Edgetech Instruments Model DPS3 is a heated dewpoint hygrometer that can measure dewpoints up to 95 °C (203°F) and as low as -35 °C (-31°F). This integrated system includes a microprocessor based electronics, a chilled mirror dewpoint sensor, a sample flow meter/valve, assorted tubing and fittings all contained in a heated, temperature controlled NEMA-4 enclosure. The DPS series heated …


  • Heated dewpoint hygrometer system for measuring dewpoints up to +95°C in high dewpoint gases
  • Solves the high dewpoint measurement problem by heating all system components to a temperature above the dewpoint temperature of the sampled gas, preventing condensation in the measurement system
  • Chilled mirror sensor provides high accuracy over the entire dew/frost range of +95°C to -35°C.
  • Automatic Balance Control mode provides correction for optics contaminants
  • Integrated DPS3 system contained in a NEMA-4 enclosure with alarm relays and continuous digital and analog outputs
  • Two models available, the DPS3 stand-alone and the DPS5 with external DewMaster Hygrometer

PPM2 Portable Trace Moisture Transmitter

The Edgetech Instruments Model PPM2 is a portable battery powered trace moisture analyzer designed specifically for monitoring moisture levels in dewpoint and ppm units. This trace moisture analyzer utilizes an electrochemical (P2O5) sensor in combination with a proprietary semi permeable diffusion membrane. The principal of operation applies the Faraday’s Law of Electrolysis which measures the dissociation current making it a …


  • Portable trace moisture analyzer for monitoring moisture levels in dew/frost point and ppm
  • Wide measurement range of 0.1 to 1250 ppmv covers many industrial and research applications
  • Fundamental measurement principle traceable to NIST standards
  • Battery powered with rechargeable batteries and charger included
  • For clean, dry, inert gas applications
OxyTrans-PSS Portable Oxygen Transmitter

OxyTrans-PSS Portable Oxygen Transmitter

The OxyTrans-PSS is a portable transmitter with sampling system and case that is an easy to use, accurate and economical way to measure oxygen at trace and percent levels in gases. The included OxyTrans oxygen concentration transmitter has a simple display and one point calibration that allows quick startup. The OxyTrans-PSS uses a special fuel cell to measure the oxygen …


  • A complete portable oxygen measurement sampling system based on the OxyTrans transmitter
  • Easy to use, accurate and economical way to remotely measure oxygen in gases at trace and percent levels
  • AC or battery powered for convenience
  • Uses a modular stainless steel fuel cell to measure the oxygen concentration
  • The measuring cell is repairable by replacing defective parts without replacing the entire cell
  • The sensor meets industrial requirements for accuracy, sensitivity and operating life.