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SRX10 RTD Temperature Logger
Scheduled Release: 4th Quarter 2026
Precision RTD Temperature Logging for Critical Validation and Process Monitoring
The SRX10 provides reliable temperature data for laboratory testing, equipment validation, and industrial process studies. Designed for precise multi-channel monitoring, the system supports industry-standard Pt100 and Pt1000 platinum RTD sensors across a measurement range of -230 °C to +300 °C (-382 °F to +572 °F). A true four-wire configuration eliminates lead wire resistance errors to ensure stable and repeatable readings. Powered by an internal lithium battery rated for up to 10 years, the SRX10 enables continuous, unattended data collection without requiring external power.
Universal Probe Support
The SRX10 is designed for high-accuracy temperature monitoring using industry-standard Pt100 and Pt1000 RTDs. Support for 2-wire, 3-wire, and true 4-wire RTD configurations allows the logger to adapt to a wide range of industrial, laboratory, validation, and environmental monitoring applications.
Clear, Actionable Temperature Data for Informed Decisions
Example multi-channel temperature profiles captured using the SRX10 and analyzed in TrendReader TRX software.
Time-Stamped Logging
Records precise temperature data at user-defined intervals for accurate chronological tracking.
Multi-Channel Comparison
View simultaneous temperature behavior across multiple zones, probes, or equipment lines on a single screen.
Long-Term Data Retention
Internal memory stores up to one million readings, enabling extended environmental and validation studies without frequent downloads.
Export & Analysis
Download data into TrendReader TRX for visualization, comparison, and automated reporting.
How It Works
1. Connect
Connect RTD Probes
Connect industry-standard Pt100 or Pt1000 RTD probes to the terminal block. The logger utilizes a true 4-wire measurement configuration to automatically eliminate lead-wire resistance for precision temperature data.
2. Record
Standalone Logging
The SRX10 records time-stamped temperature values across multiple channels at your chosen sampling interval. Readings are saved securely to non-volatile internal memory for uninterrupted, long-term studies.
3. Retrieve & Analyze
Download & Report
Connect the logger to a PC via USB to download data into TrendReader TRX software. Easily visualize multi-channel temperature trends, generate compliance reports, or export data for further process analysis.
Key Features
- Dual-Sensor Support: Compatible with Pt100 and Pt1000 platinum RTD probes conforming to IEC 60751 (TCR = 0.00385).
- True 4-Wire Measurement: Employs independent excitation and sensing leads to automatically cancel out lead-wire resistance errors, ensuring maximum accuracy.
- Flexible Wiring Configurations: Supports 2-wire, 3-wire, and 4-wire RTD hookups to accommodate existing field probes.
- High-Capacity Internal Memory: Stores up to 1 million chronological readings for uninterrupted, long-duration logging campaigns.
- Decade-Long Standalone Power: Powered by two internal, non-rechargeable lithium thionyl chloride cells for up to 10 years of typical operation.
- Two-Stage System Alerting: Features a local multi-color status LED and dual independent open-drain alarm outputs for seamless integration with external PLCs or Building Automation Systems (BAS).
- Rugged Industrial Enclosure: Housed in a flame-rated, high-impact polycarbonate/ABS thermoplastic case designed to withstand demanding environments.
- Powerful Software Integration: Fully compatible with TrendReader TRX software for easy configuration, multi-point calibration adjustments, graphic visualization, and custom equation processing.
Specifications
Sensors / Measurement
| Number of Channels | Four — three RTD inputs plus one internal thermistor temperature sensor |
|---|---|
| Supported Sensors | Platinum RTDs (Pt100 and Pt1000, TCR = 0.00385) |
| Supported Wiring | 2-wire, 3-wire, and true 4-wire RTD configurations |
Accuracy Guidance
| Temperature Range | −230 °C to +300 °C (probe dependent) |
|---|---|
| Accuracy | ±0.45 °C across the full supported range† |
| Resolution | 0.01 °C |
| Measurement Stability | High stability precision measurement electronics |
| System Calibration Engine | Software-supported single-point calibration offset (bias) adjustment. For optimal performance, calibrate the logger and your chosen RTD probe together at your target temperature range.‡ |
Electrical Characteristics
| Measurement Resolution | 16-bit A/D conversion |
|---|---|
| Electrical Resistance Accuracy | ±0.15 Ω (Pt100) / ±1.5 Ω (Pt1000) |
| RTD Excitation | Precision constant-current excitation optimized for Pt100 and Pt1000 RTDs (~1 mA / ~0.1 mA) |
| Lead Resistance Compensation | Supports 3-wire and 4-wire RTD lead resistance compensation |
Data Logging & Storage
| Memory Size | One million readings |
|---|---|
| Sampling Interval | Configurable: 10 seconds to 24 hours |
| Sampling Methods | Continuous (FIFO); Stop when full; Delayed start (up to 60 days); Spot or averaged readings |
| Data Retention | Non-volatile memory retains logged data and channel configuration when power is off |
| Clock Accuracy | ±1 second per day |
Software
| Software Compatibility | ACR TrendReader TRX software |
|---|---|
| Software Features | Logger configuration; data download; real-time readings; two-stage alarms; multi-point calibration; graphical and tabular reports; data export; custom equations |
Power
| Battery Type | Two 3.6 V lithium thionyl chloride (Li-SOCl₂) cells, non-rechargeable |
|---|---|
| Battery Life | Up to 10 years (typical logging conditions). Battery life depends on sample rate, active channels, alarm activity, and environmental conditions during operation and storage. |
| Rechargeable? | No. Battery replacement services are available from ACR. Replacement procedures are available for qualified personnel. |
Alarms & Indicators
| Alarm Outputs | 2 open-drain outputs |
|---|---|
| Maximum Output Voltage | 15 VDC |
| Maximum Output Current | 350 mA per channel |
| Alarm Modes | Two-level alarms (Warning and Critical) |
| LED Indicators |
Green — Logging Blue — Delayed Start Yellow — Warning Alarm Red — Critical Alarm Magenta — Memory Full Flash Rate: 10 seconds |
Physical Specifications
| Size |
111 × 74 × 27 mm 4-3/8 × 2-15/16 × 1-1/16 in |
|---|---|
| Weight | 140 g (5 oz) |
| Interface | USB (via software) |
| Enclosure Material | Polycarbonate/ABS thermoplastic with high impact resistance and UL 94 V-0 flame rating |
| Magnetic Mounting | Integrated magnets for mounting to metal surfaces |
| Threaded Mounting Insert | 4-40 threaded insert for bracket or surface mounting |
Environmental
| Operating Temperature | −40 to +85 °C (−40 °F to +185 °F) |
|---|---|
| Recommended Long-Term Storage Temperature |
−20 °C to +60 °C (−4 °F to +140 °F) Prolonged exposure to extremes of this range may shorten battery life and possibly reduce long-term reliability. |
| Humidity Range | 0–95% RH (non-condensing) |
Regulatory & Safety
| CE | CE marking in accordance with applicable EU directives |
|---|---|
| RoHS | Compliant with Directive 2011/65/EU and amendments (Category 9) |
| FCC Part 15 | Complies with FCC Part 15 Class B. Operation is subject to the following conditions: the device may not cause harmful interference and must accept any interference received. |
| ICES-003 | This Class B digital apparatus complies with Canadian ICES-003. |
| WEEE | Dispose or recycle in accordance with WEEE regulations. Units may also be returned to ACR Systems for responsible disposal. |
† Instrument accuracy only. Total system accuracy depends on the RTD probe class, wiring configuration, calibration method, and operating temperature range.
‡ Contact ACR for application-specific recommendations or calibration services.
Download the SRX10 Spec Sheet (PDF)
Complete technical details across 3 pages, including specifications, accuracy, channel setup, and input types—ideal for engineering, QA, and purchasing teams.
Download PDF (935 KB)What's in the Box?
Your SRX10 package includes the essential hardware to get you up and running. Software and documentation are provided via digital access for convenience.
Included in the box:
- SRX10 RTD Temperature Logger
- Mini USB Interface Cable
- 6x Terminal Jumper Wires (Supports 2-wire and 3-wire RTD channel configurations)
- Digital Access Welcome Card (Includes direct links for software and documentation downloads)
Also provided via digital download:
- TrendReader TRX Software
- SRX10 User Guide (Available in PDF and web-optimized digital formats—fully compatible with browser translation for international teams)
Online User Manual – SRX10 RTD Temperature Logger
Get the most out of your SRX10 with our online user guide — your go-to resource for setup, thermocouple tips, calibration guidance, specifications, and more.
🔗 View Full Online Manual
Why 4-Wire RTDs Provide the Highest Measurement Accuracy
4-wire RTDs provide the highest level of temperature measurement accuracy by virtually eliminating errors caused by lead wire resistance. Learn how 2-wire, 3-wire, and 4-wire RTD configurations differ and why 4-wire sensors are preferred for precision industrial and laboratory applications.
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Ways to Buy
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Let’s Connect — We’re Here to Help
We’d love to help you determine if the SRX10 is the right fit—or recommend a better option if needed. Whether you’re requesting a quote, seeking technical guidance, or tackling a data logging or monitoring challenge, we’re here to support you.
Call ACR Now
Call ACR: 1-800-663-7845
North America: 1-800-663-7845
International: +1-604-591-1128
Mon–Fri 8:30 AM – 4:30 PM PT
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