The Vaisala HMM100 provides reliable humidity measurement and a configurable analog output for integration into environmental chambers and OEM equipment.
The Vaisala HUMICAP® HMM100 is an open-frame humidity module designed for integration into environmental chambers and OEM equipment. It provides a single configurable analog output for relative humidity or dew point and offers several probe, cable, filter and electrical configurations.
The separate probe allows the sensing point to be installed inside the chamber while the component board remains in a protected and serviceable location. Depending on the selected configuration, the HMM100 can provide a loop-powered 4–20 mA output or a configurable current or voltage output.
The HMM100 measures relative humidity from 0–100% RH and can output either relative humidity or dew-point temperature. Full temperature compensation supports measurement across changing chamber conditions, while the available probe and filter options accommodate different temperatures and installation requirements.
Plastic and stainless-steel probe versions are available. With a suitable probe and filter, the measurement probe can operate at temperatures up to +180 °C. The component board must remain within its specified operating-temperature range.
The HMM100 is suitable for chamber controllers and data-acquisition systems that accept conventional analog signals. The required output arrangement must be selected when specifying the module.
The three-wire version can be configured for 0–1 V, 0–5 V, 0–10 V or 1–5 V output according to the controller input and module configuration.
The HMM100 uses the Vaisala HUMICAP® 180R sensor for stable humidity measurement. Two adjustment trimmers on the component board allow humidity offset and gain to be adjusted during field calibration.
A service connection is also available for configuration and calibration using the appropriate Vaisala service cable and software. Calibration frequency should be based on chamber conditions, measurement criticality, operating temperature and the applicable quality requirements.
All three modules are designed for integration into environmental chambers or OEM equipment. The correct model depends mainly on the controller interface, required outputs, chamber conditions and maintenance functions.
| Selection point | Vaisala HMM100 | Vaisala HMM105 | Vaisala HMM170 |
|---|---|---|---|
| Best suited for | Conventional chambers requiring one analog measurement output | OEM chambers and incubators with direct I2C controller integration | Demanding chambers requiring higher accuracy, multiple outputs or condensation protection |
| Measured parameters | Relative humidity or dew point | Relative humidity or dew point | Relative humidity, temperature, dew point and other calculated parameters |
| Humidity range | 0–100% RH | 0–100% RH | 0–100% RH |
| RH accuracy at −20 to +40 °C | ±2% RH from 0–90% RH | ±2% RH from 0–90% RH | Approximately ±1.0 to ±1.7% RH, depending on temperature and RH |
| Primary output | One configurable current or voltage output | Digital I2C | Modbus RTU and three configurable analog outputs |
| Probe temperature capability | Up to +180 °C, depending on probe and filter | Up to +180 °C continuously; +200 °C short-term peak | −70 to +180 °C |
| Probe arrangement | Plastic or stainless-steel probe with several cable and length options | Detachable 12 mm probe with fixed 300 mm flexible cable | 12 mm stainless-steel probe with 2, 5 or 10 m cable options |
| Condensation and chemical protection | Standard HUMICAP measurement without active probe heating | Standard HUMICAP measurement without active probe heating | Optional sensor purge, probe heating and sensor warming |
| Configuration and servicing | Service port and on-board adjustment trimmers | Configuration and adjustment through the I2C interface | Vaisala Insight software through the integrated service port |
Quick selection: choose HMM100 when the chamber controller needs a conventional analog signal. Choose HMM105 when direct I2C communication and a compact detachable probe are required. Choose HMM170 for demanding installations needing improved accuracy, Modbus RTU, several analog outputs, longer probe cables or active condensation protection.
Before ordering the HMM100, confirm whether the controller requires a two-wire or three-wire connection, the required current or voltage signal, the output parameter, probe material, probe length, cable length, protective filter and maximum chamber temperature.
For existing equipment, provide the current HMM100 model code, wiring arrangement, power supply and controller scaling. When planning an upgrade to HMM170, the circuit-board footprint may simplify the mechanical work, but the electrical connections, controller programming and output configuration must still be checked.
Seacom Process Instruments supplies and supports the Vaisala HMM100 Humidity Module in Malaysia for environmental chambers, stability chambers, climatic test equipment and OEM humidity-measurement systems.
Our team can assist with probe material, cable length, filter, analog output, power supply, installation accessories, controller scaling and calibration planning. We can also help compare the HMM100 with the digital HMM105 and advanced HMM170.
Contact Seacom with your chamber operating range, required output, controller input, installation dimensions and probe conditions so we can recommend a suitable HMM100 configuration.
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The Vaisala HMM105 provides reliable humidity measurement for integration into environmental chambers, incubators and OEM equipment.
The Vaisala HMM170 provides accurate and stable humidity and temperature measurement for demanding environmental chambers, including vacuum and pressurised applications.
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The Vaisala HMD60 Series duct-mounted humidity and temperature transmitters provide accurate and stable measurement for demanding HVAC applications.
Available models include the HMD62, TMD62 and HMD65, with 4–20 mA, 0–10 V, Modbus RTU and BACnet MS/TP output options.
The Vaisala Indigo300 is a rugged industrial transmitter for one Vaisala Indigo-compatible smart probe, providing local measurement display and up to three configurable analog outputs.
Its corrosion-resistant IP66 metal enclosure, flexible probe mounting and interchangeable probe design make Indigo300 suitable for humidity, temperature, dew point, CO2, moisture in oil and other demanding industrial measurements.
The Vaisala HMT120 and HMT130 provide accurate, stable humidity and temperature measurement for cleanrooms, laboratories, data centres and demanding HVAC applications.
Product transition: HMT120/HMT130 are expected to be phased out. For new projects, the Vaisala Origo10 is the recommended replacement platform.
The Vaisala HMP3 is a high-accuracy, field-maintainable probe for industrial HVAC, air-handling units, cleanrooms, paint booths and environmental chambers.
The Vaisala XMW85 Series provides reliable indoor CO2, humidity and temperature measurement for demand-controlled ventilation, smart buildings and indoor air-quality monitoring.
All models support Modbus RTU over RS-485, with two-in-one and three-in-one measurement configurations and optional metric or non-metric displays.
The Vaisala HMT370EX provides humidity, temperature and moisture measurement in hazardous areas containing potentially explosive gases or dust, with certified configurations for operation up to Zone 0 and Zone 20.
The Vaisala HMP60 is a compact, durable and cost-effective humidity and temperature probe for equipment integration, data loggers, incubators, glove boxes, greenhouses and environmental monitoring systems.
It provides 0–100% RH and −40 °C to +60 °C measurement ranges, low power consumption, interchangeable Vaisala INTERCAP sensor and optional Modbus RTU communication.
The wall-mounted Vaisala GMW90 Series CARBOCAP® Carbon Dioxide, Temperature and Humidity Transmitters are especially suited for green building projects and demand controlled ventilation. The devices measure carbon dioxide and temperature and have an option for an additional humidity measurement.
The instruments come with a calibration certificate that meets traceability and compliance requirements. Traceability is easily maintained with field-exchangeable intelligent measurement modules. The transmitter can be blended into the interior design of the space where it is installed using the optional decorative cover.
The Vaisala HMM170 provides accurate and stable humidity and temperature measurement for demanding environmental chambers, including vacuum and pressurised applications.
The Vaisala Indigo500 Series provides flagship industrial measurement integration: choose Indigo510 for a simplified single-probe system or Indigo520 for full dual-probe capability.
The Vaisala HMT140 Wi-Fi Data Logger has been discontinued and is no longer recommended for new monitoring systems.
The Vaisala HMP8 provides high-accuracy humidity and temperature measurement in compressed air, refrigerant dryers and pressurised industrial processes up to 40 bar.
The Vaisala HMM100 provides reliable humidity measurement and a configurable analog output for integration into environmental chambers and OEM equipment.
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HMM100 Catalogue
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