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SRX2 Dual-Location Temperature & Humidity Data Logger
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SRX2 Dual-Location Temperature & Humidity Data Logger

The SRX2 is a temperature and humidity data logger designed to measure conditions in two locations at the same time. It features onboard temperature and relative humidity sensing and supports one optional remote temperature and RH probe, allowing users to monitor conditions inside ducts, enclosures, or storage spaces while also tracking the surrounding ambient environment.

Key Features

  • Onboard temperature and relative humidity measurement
  • Support for one optional remote temperature & RH probe
  • Wide operating temperature range: −40°C to +85°C
  • 0–100 %RH, ±3 %RH accuracy
  • Typical battery life up to 10 years under normal operating conditions
  • 1 million reading onboard memory to support long-term or high-frequency logging
  • NIST-traceable calibration available, with recalibration services to support ongoing accuracy requirements

In addition to temperature and humidity measurement, SRX2 includes additional input channels that can be used when needed.

  • Two 4–20 mA DC current inputs
  • One 0–5 V DC input
  • One 0–10 V DC input

These inputs allow SRX2 to record signals from common transmitters such as pressure, airflow, or level sensors, enabling correlation between environmental conditions and system behavior.

$999.00 USD

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Description Specifications Software Documentation Q&A Calibration

Designed for Reliable, Long-Term Temperature and Humidity Monitoring

The SRX2 is purpose-built for applications where accurate temperature and relative humidity data must be collected over long periods with minimal maintenance. It combines onboard temperature and RH sensing with support for one optional remote temperature and RH probe, allowing conditions to be monitored in two locations simultaneously—such as ambient room conditions and the interior of a duct, enclosure, or storage space.

Relative humidity is measured over a full 0–100 %RH range with ±3 %RH accuracy, providing dependable data for building monitoring, environmental diagnostics, pharmaceutical storage, and general facility applications. A wide operating temperature range of −40°C to +85°C supports use in both indoor and demanding environments.

Built for Extended Deployments

SRX2 is designed for unattended operation. A typical battery life of up to 10 years under normal operating conditions minimizes servicing requirements, while a 1 million reading onboard memory supports long deployments even at relatively short sample intervals. Flexible logging modes allow users to tailor data collection to the application, whether monitoring slow environmental changes or capturing shorter-term events.

Alarm thresholds can be configured to flag out-of-range conditions, providing visual indication and recorded events that help users quickly identify excursions or system issues.

Optional Expansion Beyond Temperature and Humidity

While SRX2 is first and foremost a temperature and humidity logger, it also includes additional analog input channels for applications that require more advanced measurements. These include two 4–20 mA current inputs, as well as dedicated 0–5 V and 0–10 V DC inputs, enabling connection to common transmitters such as pressure, airflow, or level sensors when needed.

These optional inputs allow environmental data to be correlated with system or process signals, without changing the core role of the logger.

Data Analysis and Reporting with TRX Software

SRX2 is configured, downloaded, and analyzed using ACR’s TRX Software for Windows. TRX provides an intuitive interface for graphing temperature, humidity, and analog input data on a shared time axis, allowing users to zoom into events, review trends, and generate reports for documentation or record keeping. Data can be exported to common file formats for further analysis or archiving.

Calibration Support

To support accuracy and compliance requirements, NIST-traceable calibration is available, along with recalibration services to maintain performance over the life of the device.

Specifications

Alarm Connector Critical and Warning connections
Maximum 15V
Maximum 350mA
Battery 3.6V Lithium
Typical battery life: 10 years under normal operating conditions @ 25°C
Channel 0 - Internal Temp Resolution: 0.01°C
Range: -40°C - 85°C
Accuracy: ± 0.3°C
Channel 1 & 2 DC Current Input Impedance: 10 ohms
Resolution: 16-bit
Range: 0 – 25mA DC
Accuracy: ± 0.5% Full Scale
Channel 3 – DC Voltage Input Impedance: ~ 1 Megohm
Resolution: 16-bit
Range: 0 – 5V DC
Accuracy: ± 0.5% Full Scale
Channel 4 – DC Voltage Input Impedance: ~ 1 Megohm
Resolution: 16-bit
Range: 0 – 10V DC
Accuracy: ± 0.5% Full Scale
Channel 5 – Internal Sensor RH Resolution: 0.01 %RH
Range: 0 – 100 %RH
Accuracy: ± 3 %RH
Channel 6 - for external probe Typical: EH-030 Temperature channel
Channel 7 - for external probe Typical: EH-030 RH channel
Clock Accuracy ± 1 seconds per day
LED Status & Alarm Lights High & Low thresholds per channel
Latch / Self-reset
Memory Size 1 Million Readings
Operating Limits -40°C to 85°C (-40°F to 185°F)
0 to 95% RH non-condensing
Sample Rates 1 minute to 24 hours
Sampling Methods Continuous (first-in-first-out) / Stop when full
Immediate start / Delayed start - up to 2 months
Spot / Averaged Readings
Size 111 mm (4 3/8") x 74mm (2 15/16") x 27 mm (1 1/16")
Status Indicator Flash rate: 10 seconds
Green: logging
Blue: delayed start
Yellow: alarm warning
Red: critical alarm
Magenta: memory full
Warranty 3 Years
Weight 140g (5 oz)

Software

Data Configuration, Visualization, and Reporting with TRX Software

The SRX2 Temperature and Humidity Logger is configured, downloaded, and analyzed using ACR’s TRX Software for Windows.

TRX is a PC-based software application designed to make it easy to work with temperature, humidity, and analog input data—whether reviewing quick trends or producing documented reports.

Key Software Capabilities

Using TRX software, users can:

  • Configure sample rates, start modes, and logging parameters
  • Enable and configure the optional remote temperature and RH probe
  • Set two-stage alarm thresholds (warning and critical levels)
  • Download recorded data from the logger via USB
  • Graph temperature, humidity, and analog input data on a shared time axis
  • Zoom, pan, and inspect data to identify events and trends
  • Generate reports for documentation and record keeping
  • Export data to common file formats such as CSV for further analysis

The software interface is designed to be straightforward for first-time users, while still offering the depth needed for technical and compliance-driven applications.

Platform Information

  • Software type: PC-based application
  • Operating system: Windows
  • Cloud connection required: No

Learn More About TRX Software

For additional details, screenshots, and supported features, visit the TRX Software page:

TRX Software for Windows

Documentation

For a product sheet, please click below for a pdf version.

Product Sheet

Q&A

What is the SRX2 designed to measure?

The SRX2 is designed primarily for temperature and relative humidity monitoring. It measures ambient conditions using onboard sensors and can also monitor temperature and humidity at a second location using an optional remote temperature and RH probe.

Does the SRX2 measure temperature and humidity in two locations at the same time?

Yes. SRX2 supports dual-location temperature and humidity monitoring by combining onboard temperature and RH sensing with a single optional remote temperature and RH probe.

Is the remote temperature and humidity probe included?

No. The remote temperature and RH probe is optional and sold separately. The logger operates fully as a temperature and humidity logger using its onboard sensors without any additional accessories.

What is the accuracy of the humidity measurement?

Relative humidity is measured over a 0–100 %RH range with ±3 %RH accuracy.

How long does the battery last?

SRX2 is designed for long-term, unattended deployments. Under normal operating conditions, the typical battery life is up to 10 years, depending on sample rate, operating environment, and usage.

How much data can the SRX2 store?

The SRX2 includes 1 million reading onboard memory, allowing long deployments even at relatively short sample intervals.

Can SRX2 record other types of signals besides temperature and humidity?

Yes. In addition to temperature and humidity measurement, SRX2 includes two 4–20 mA current inputs, as well as one 0–5 V and one 0–10 V DC input. These optional inputs can be used to record signals from external transmitters such as pressure, airflow, or level sensors when needed.

Do I need to use the analog input channels?

No. The analog input channels are optional and are not required for temperature and humidity monitoring. Many users operate SRX2 exclusively as a temperature and humidity logger.

What software is used with the SRX2?

SRX2 is configured, downloaded, and analyzed using ACR’s TRX Software for Windows.

What can I do with the TRX software?

TRX software allows users to:

  • Configure logging and alarm parameters
  • Graph temperature, humidity, and analog input data
  • Zoom into events and review trends
  • Generate reports for documentation
  • Export data to common file formats such as CSV

Does the SRX2 support alarms?

Yes. Alarm thresholds can be configured in TRX software. Alarm events are recorded and can be indicated visually via the logger’s status LEDs.

Is calibration available?

Yes. NIST-traceable calibration is available, and ACR offers recalibration services to help maintain measurement accuracy over time.

Is SRX2 suitable for regulated or compliance-driven applications?

SRX2 is commonly used in regulated environments where repeatability, documentation, and calibration traceability are important. Users should determine suitability for their specific regulatory requirements.

Is the SRX2 a cloud-based or subscription product?

No. SRX2 uses PC-based TRX software and does not require a cloud service or subscription.

How do I download data from the SRX2?

Data is downloaded from the SRX2 using ACR’s TRX Software for Windows.

To download data:

  1. Connect the SRX2 to a Windows PC using the USB interface cable.
  2. Launch the TRX software.
  3. TRX automatically detects the logger and allows you to download, view, and save recorded data.

Once connected, TRX also allows you to configure sample rates, enable optional remote temperature and RH probe inputs, and set up two-stage alarm thresholds for monitored parameters. Downloaded data can be graphed, reviewed, and exported to common file formats for reporting or further analysis.

Calibration

Calibration Options for the SRX2 Temperature & Humidity Logger

The SRX2 is designed to deliver reliable temperature and relative humidity measurements over long deployment periods. To support accuracy and documentation requirements, NIST-traceable calibration services are available for SRX2.

Calibration is performed using reference standards that are traceable to the National Institute of Standards and Technology (NIST), providing confidence in measurement integrity and supporting quality and compliance programs.

Factory Calibration

SRX2 data loggers are calibrated during manufacturing to ensure they meet published performance specifications. This calibration establishes baseline accuracy for temperature and relative humidity measurements prior to shipment.

NIST-Traceable Calibration (Optional)

For applications requiring documented traceability, NIST-traceable calibration certificates can be provided at the time of purchase or during recalibration.

NIST-traceable calibration includes:

  • Calibration of temperature and relative humidity measurement channels
  • Documented test points and results
  • Traceability to recognized national standards

Calibration certificates are suitable for quality records, validation documentation, and audit support.

Recalibration Services

ACR offers recalibration services to help maintain measurement accuracy over the life of the device. Recalibration intervals depend on application requirements, environmental conditions, and internal quality procedures.

Periodic recalibration is recommended for:

  • Regulated or compliance-driven environments
  • Long-term monitoring programs
  • Applications where documented accuracy is required

Calibration vs. Adjustment

Calibration verifies measurement accuracy against known reference standards.

Adjustment (if required) involves aligning the device’s measurements to those standards.

SRX2 calibration services follow established calibration practices and document results clearly, allowing users to determine ongoing suitability for their application.

Optional Remote Probe Calibration

When an optional remote temperature and RH probe is used, calibration services can be applied to the probe as well. Probe calibration ensures that both onboard and remote measurements maintain known accuracy when dual-location monitoring is required.

Important Notes

  • Calibration frequency is determined by the user and application requirements.
  • In regulated or compliance-driven environments, a one-year calibration interval is commonly used as a best practice.
  • Environmental conditions, handling, and deployment duration can influence recalibration intervals.
  • NIST-traceable calibration certification is optional and must be purchased separately.
  • Standard product shipment does not include an additional NIST-traceable calibration certificate unless specifically ordered.
  • Calibration services are optional and are not required for general monitoring applications.
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data-start=\"558\" data-end=\"630\"\u003eDesigned for Reliable, Long-Term Temperature and Humidity Monitoring\u003c\/h3\u003e\n\u003cp data-start=\"632\" data-end=\"1069\"\u003eThe SRX2 is purpose-built for applications where accurate temperature and relative humidity data must be collected over long periods with minimal maintenance. It combines onboard temperature and RH sensing with support for one \u003ca href=\"https:\/\/www.acrdatasolutions.com\/products\/rh-temp-external-probe\"\u003eoptional remote temperature and RH probe\u003c\/a\u003e, allowing conditions to be monitored in two locations simultaneously—such as ambient room conditions and the interior of a duct, enclosure, or storage space.\u003c\/p\u003e\n\u003cp data-start=\"1071\" data-end=\"1404\"\u003eRelative humidity is measured over a full 0–100 %RH range with ±3 %RH accuracy, providing dependable data for building monitoring, environmental diagnostics, pharmaceutical storage, and general facility applications. A wide operating temperature range of −40°C to +85°C supports use in both indoor and demanding environments.\u003c\/p\u003e\n\u003ch3 data-start=\"1406\" data-end=\"1440\"\u003eBuilt for Extended Deployments\u003c\/h3\u003e\n\u003cp data-start=\"1442\" data-end=\"1872\"\u003eSRX2 is designed for unattended operation. A typical battery life of up to 10 years under normal operating conditions minimizes servicing requirements, while a 1 million reading onboard memory supports long deployments even at relatively short sample intervals. Flexible logging modes allow users to tailor data collection to the application, whether monitoring slow environmental changes or capturing shorter-term events.\u003c\/p\u003e\n\u003cp data-start=\"1874\" data-end=\"2051\"\u003eAlarm thresholds can be configured to flag out-of-range conditions, providing visual indication and recorded events that help users quickly identify excursions or system issues.\u003c\/p\u003e\n\u003ch3 data-start=\"2053\" data-end=\"2107\"\u003eOptional Expansion Beyond Temperature and Humidity\u003c\/h3\u003e\n\u003cp data-start=\"2109\" data-end=\"2487\"\u003eWhile SRX2 is first and foremost a temperature and humidity logger, it also includes additional analog input channels for applications that require more advanced measurements. These include two 4–20 mA current inputs, as well as dedicated 0–5 V and 0–10 V DC inputs, enabling connection to common transmitters such as pressure, airflow, or level sensors when needed.\u003c\/p\u003e\n\u003cp data-start=\"2489\" data-end=\"2630\"\u003eThese optional inputs allow environmental data to be correlated with system or process signals, without changing the core role of the logger.\u003c\/p\u003e\n\u003ch3 data-start=\"2632\" data-end=\"2681\"\u003eData Analysis and Reporting with TRX Software\u003c\/h3\u003e\n\u003cp data-start=\"2683\" data-end=\"3074\"\u003eSRX2 is configured, downloaded, and analyzed using \u003ca href=\"https:\/\/www.acrdatasolutions.com\/products\/trx-software-pro\"\u003eACR’s TRX Software for Windows\u003c\/a\u003e. TRX provides an intuitive interface for graphing temperature, humidity, and analog input data on a shared time axis, allowing users to zoom into events, review trends, and generate reports for documentation or record keeping. Data can be exported to common file formats for further analysis or archiving.\u003c\/p\u003e\n\u003ch3 data-start=\"3076\" data-end=\"3099\"\u003eCalibration Support\u003c\/h3\u003e\n\u003cp data-start=\"3101\" data-end=\"3281\"\u003eTo support accuracy and compliance requirements, NIST-traceable calibration is available, along with recalibration services to maintain performance over the life of the device.\u003c\/p\u003e"}
Translation missing: en.general.search.loading
{"id":7631379923115,"title":"SRX2 Dual-Location Temperature \u0026 Humidity Data Logger","handle":"srx2-temperature-relative-humidity-rh-logger","description":"\u003ch3 data-start=\"558\" data-end=\"630\"\u003eDesigned for Reliable, Long-Term Temperature and Humidity Monitoring\u003c\/h3\u003e\n\u003cp data-start=\"632\" data-end=\"1069\"\u003eThe SRX2 is purpose-built for applications where accurate temperature and relative humidity data must be collected over long periods with minimal maintenance. It combines onboard temperature and RH sensing with support for one \u003ca href=\"https:\/\/www.acrdatasolutions.com\/products\/rh-temp-external-probe\"\u003eoptional remote temperature and RH probe\u003c\/a\u003e, allowing conditions to be monitored in two locations simultaneously—such as ambient room conditions and the interior of a duct, enclosure, or storage space.\u003c\/p\u003e\n\u003cp data-start=\"1071\" data-end=\"1404\"\u003eRelative humidity is measured over a full 0–100 %RH range with ±3 %RH accuracy, providing dependable data for building monitoring, environmental diagnostics, pharmaceutical storage, and general facility applications. A wide operating temperature range of −40°C to +85°C supports use in both indoor and demanding environments.\u003c\/p\u003e\n\u003ch3 data-start=\"1406\" data-end=\"1440\"\u003eBuilt for Extended Deployments\u003c\/h3\u003e\n\u003cp data-start=\"1442\" data-end=\"1872\"\u003eSRX2 is designed for unattended operation. A typical battery life of up to 10 years under normal operating conditions minimizes servicing requirements, while a 1 million reading onboard memory supports long deployments even at relatively short sample intervals. Flexible logging modes allow users to tailor data collection to the application, whether monitoring slow environmental changes or capturing shorter-term events.\u003c\/p\u003e\n\u003cp data-start=\"1874\" data-end=\"2051\"\u003eAlarm thresholds can be configured to flag out-of-range conditions, providing visual indication and recorded events that help users quickly identify excursions or system issues.\u003c\/p\u003e\n\u003ch3 data-start=\"2053\" data-end=\"2107\"\u003eOptional Expansion Beyond Temperature and Humidity\u003c\/h3\u003e\n\u003cp data-start=\"2109\" data-end=\"2487\"\u003eWhile SRX2 is first and foremost a temperature and humidity logger, it also includes additional analog input channels for applications that require more advanced measurements. These include two 4–20 mA current inputs, as well as dedicated 0–5 V and 0–10 V DC inputs, enabling connection to common transmitters such as pressure, airflow, or level sensors when needed.\u003c\/p\u003e\n\u003cp data-start=\"2489\" data-end=\"2630\"\u003eThese optional inputs allow environmental data to be correlated with system or process signals, without changing the core role of the logger.\u003c\/p\u003e\n\u003ch3 data-start=\"2632\" data-end=\"2681\"\u003eData Analysis and Reporting with TRX Software\u003c\/h3\u003e\n\u003cp data-start=\"2683\" data-end=\"3074\"\u003eSRX2 is configured, downloaded, and analyzed using \u003ca href=\"https:\/\/www.acrdatasolutions.com\/products\/trx-software-pro\"\u003eACR’s TRX Software for Windows\u003c\/a\u003e. TRX provides an intuitive interface for graphing temperature, humidity, and analog input data on a shared time axis, allowing users to zoom into events, review trends, and generate reports for documentation or record keeping. Data can be exported to common file formats for further analysis or archiving.\u003c\/p\u003e\n\u003ch3 data-start=\"3076\" data-end=\"3099\"\u003eCalibration Support\u003c\/h3\u003e\n\u003cp data-start=\"3101\" data-end=\"3281\"\u003eTo support accuracy and compliance requirements, NIST-traceable calibration is available, along with recalibration services to maintain performance over the life of the device.\u003c\/p\u003e","published_at":"2023-05-12T10:26:44-07:00","created_at":"2023-04-25T16:52:59-07:00","vendor":"ACR Systems","type":"","tags":["SRX Family"],"price":99900,"price_min":99900,"price_max":99900,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":42653977346219,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"02-0040","requires_shipping":false,"taxable":true,"featured_image":null,"available":true,"name":"SRX2 Dual-Location 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data-start=\"558\" data-end=\"630\"\u003eDesigned for Reliable, Long-Term Temperature and Humidity Monitoring\u003c\/h3\u003e\n\u003cp data-start=\"632\" data-end=\"1069\"\u003eThe SRX2 is purpose-built for applications where accurate temperature and relative humidity data must be collected over long periods with minimal maintenance. It combines onboard temperature and RH sensing with support for one \u003ca href=\"https:\/\/www.acrdatasolutions.com\/products\/rh-temp-external-probe\"\u003eoptional remote temperature and RH probe\u003c\/a\u003e, allowing conditions to be monitored in two locations simultaneously—such as ambient room conditions and the interior of a duct, enclosure, or storage space.\u003c\/p\u003e\n\u003cp data-start=\"1071\" data-end=\"1404\"\u003eRelative humidity is measured over a full 0–100 %RH range with ±3 %RH accuracy, providing dependable data for building monitoring, environmental diagnostics, pharmaceutical storage, and general facility applications. A wide operating temperature range of −40°C to +85°C supports use in both indoor and demanding environments.\u003c\/p\u003e\n\u003ch3 data-start=\"1406\" data-end=\"1440\"\u003eBuilt for Extended Deployments\u003c\/h3\u003e\n\u003cp data-start=\"1442\" data-end=\"1872\"\u003eSRX2 is designed for unattended operation. A typical battery life of up to 10 years under normal operating conditions minimizes servicing requirements, while a 1 million reading onboard memory supports long deployments even at relatively short sample intervals. Flexible logging modes allow users to tailor data collection to the application, whether monitoring slow environmental changes or capturing shorter-term events.\u003c\/p\u003e\n\u003cp data-start=\"1874\" data-end=\"2051\"\u003eAlarm thresholds can be configured to flag out-of-range conditions, providing visual indication and recorded events that help users quickly identify excursions or system issues.\u003c\/p\u003e\n\u003ch3 data-start=\"2053\" data-end=\"2107\"\u003eOptional Expansion Beyond Temperature and Humidity\u003c\/h3\u003e\n\u003cp data-start=\"2109\" data-end=\"2487\"\u003eWhile SRX2 is first and foremost a temperature and humidity logger, it also includes additional analog input channels for applications that require more advanced measurements. These include two 4–20 mA current inputs, as well as dedicated 0–5 V and 0–10 V DC inputs, enabling connection to common transmitters such as pressure, airflow, or level sensors when needed.\u003c\/p\u003e\n\u003cp data-start=\"2489\" data-end=\"2630\"\u003eThese optional inputs allow environmental data to be correlated with system or process signals, without changing the core role of the logger.\u003c\/p\u003e\n\u003ch3 data-start=\"2632\" data-end=\"2681\"\u003eData Analysis and Reporting with TRX Software\u003c\/h3\u003e\n\u003cp data-start=\"2683\" data-end=\"3074\"\u003eSRX2 is configured, downloaded, and analyzed using \u003ca href=\"https:\/\/www.acrdatasolutions.com\/products\/trx-software-pro\"\u003eACR’s TRX Software for Windows\u003c\/a\u003e. TRX provides an intuitive interface for graphing temperature, humidity, and analog input data on a shared time axis, allowing users to zoom into events, review trends, and generate reports for documentation or record keeping. Data can be exported to common file formats for further analysis or archiving.\u003c\/p\u003e\n\u003ch3 data-start=\"3076\" data-end=\"3099\"\u003eCalibration Support\u003c\/h3\u003e\n\u003cp data-start=\"3101\" data-end=\"3281\"\u003eTo support accuracy and compliance requirements, NIST-traceable calibration is available, along with recalibration services to maintain performance over the life of the device.\u003c\/p\u003e"}