# Hioki U8554 Strain Unit Plug-in Module (5-Channel, 1 ms) for LR8450 Memory HiLogger # Hioki U8554 Strain Unit Plug-in Module (5-Channel, 1 ms) for LR8450 Memory HiLogger ## Key Features At A Glance - Modular portable data logger accepting plug-in and wireless units for voltage, temperature, humidity, resistance, and strain - LR8450 supports up to 4 plug-in units (120 ch); LR8450-01 adds up to 7 wireless units for up to 330 channels - Each unit incorporates its own A/D converter, keeping the maximum sampling rate high even as channels are added - Sampling down to 1 ms for voltage and strain; 10 ms for temperature, humidity, and resistance measurement - 7-inch WVGA (800x480) TFT color LCD with simultaneous waveform and numerical-value display - LAN (Ethernet) with HTTP/FTP servers and FTP/NTP clients, USB host and function ports, and SD memory card slot - 8-channel alarm output and 8-channel pulse measurement, plus two switchable 5/12/24 V sensor power outputs - 3-year product warranty; built-in buffer memory retains measurement data through power or wireless interruptions - Battery-pack operable for measurement where AC power is unavailable The Hioki LR8450 Memory HiLogger is a portable, modular multi-channel data logger built around your choice of plug-in and wireless measurement units. It is offered in two models: the Standard Model LR8450, designed for use with plug-in units only, and the Wireless LAN Model LR8450-01, which adds support for wireless units. A single logger can record voltage, temperature (thermocouple and RTD), humidity, resistance, and strain, gathering all of those signals into one synchronized time sequence. The LR8450 is applied across a range of measurement tasks. It is used for voltage measurement of pressure-sensor and vibration-sensor outputs at up to a 1 ms sampling rate, for battery temperature-rise monitoring, automotive part temperature measurement, and road testing of automobiles. It is used to measure temperature near inverters and batteries, to test hydraulic equipment, and for strain measurement on pipes, aircraft wings, brakes, and the stress and load on moving parts. With wireless units, strain gages can be placed close to the measurement point so that the long, thin gage wires that are prone to breakage are kept short. ValueTronics stocks and holds its own inventory in a 20,000 square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois, so the instruments we list are equipment we keep on hand. That combination lets engineers source a configured LR8450 logger with confidence in both its condition and its availability. ## Compare Other Models in This Series The Memory HiLogger LR8450 family is offered in two models that share the same instrument platform, display, and measurement-unit ecosystem. The Standard Model LR8450 is designed for use with plug-in units only, while the Wireless LAN Model LR8450-01 adds the ability to connect wireless measurement units in addition to plug-in units. Both models accept the same plug-in measurement units and the same SD/USB storage, drive the same 7-inch color display, and provide the same LAN, USB, pulse, alarm, and voltage-output interfaces. The choice between them is driven by whether wireless measurement units and wireless LAN connectivity are needed for the application. Each model below is its own dedicated product page with condition-matched pricing. Select the new LR8450 or LR8450-01 configuration that matches your required channel count and connectivity, and review that page for its specific availability and price. The two models differ in connectivity and maximum channel count. The Standard LR8450 connects up to four plug-in units for as many as 120 channels. The LR8450-01 adds support for up to seven wireless units, which can be mixed with plug-in units for a maximum of 330 channels, and it includes a wireless LAN interface (IEEE 802.11b/g/n) with access point and station modes that the Standard model does not provide. Beyond connectivity, the LR8450-01 introduces wireless-specific behavior: each wireless unit carries its own buffer memory for data retention during communication dropouts, and the logger periodically corrects the sampling-timing shift between mixed wireless and plug-in units. See the comparison table that follows for the per-model channel maximums and interface differences. Model Channels Max Sampling Rate Measurement Target **U8554** 5 1 ms Voltage, strain LR8450 120 1 ms — LR8450-01 330 1 ms — U8550 15 10 ms Voltage, thermocouples, humidity Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Accessories Supplied - Instruction Manual - Installation screws × 2 - Wiring confirmation label ## Product Core & Specifications Specification Value General Specifications Number of input channels 5 (set voltage or strain for each channel) Input terminals Push-button type terminal block (5 terminals per channel), outfitted with terminal block cover; set DIP switches according to measurement target Measurement target Voltage, strain Strain gage 1-gage method (2-wire), 1-gage method (3-wire), 2-gage method (adjacent sides), 4-gage method Adaptive gage resistance 1-gage / 2-gage method: 120 Ω (external bridge box required for 350 Ω); 4-gage method: 120 Ω to 1 kΩ Gage ratio 2.0 (fixed) Bridge voltage 2 V ±0.05 V DC Balance adjustment Electronic auto-balancing Input type Balanced differential input, simultaneous sampling of all channels (non-isolated channels) A/D resolution 16 bit Maximum input voltage ±0.5 V DC Maximum channel-to-channel voltage Non-isolated (all channels share common GND) Maximum rated terminal-to-ground voltage 30 Vrms AC or 60 V DC Input resistance 2 MΩ ±5% Data refresh interval 1 ms to 10 s (13 selectable levels) Low-pass filter Cutoff frequency −3 dB ±30%; Auto, 120, 60, 30, 15, 8, 4 Hz; 5th-order Butterworth, −30 dB/oct Dimensions Approx. 134W × 70H × 63D mm (5.28″W × 2.76″H × 2.48″D) Mass Approx. 236 g (8.3 oz.) Voltage Accuracy (23 ±5°C, LPF 4 Hz, 1 Year) 1 mV f.s. Resolution 50 nV; measurable −1 mV to 1 mV; accuracy ±9 µV 2 mV f.s. Resolution 100 nV; measurable −2 mV to 2 mV; accuracy ±10 µV 5 mV f.s. Resolution 250 nV; measurable −5 mV to 5 mV; accuracy ±25 µV 10 mV f.s. Resolution 500 nV; measurable −10 mV to 10 mV; accuracy ±50 µV 20 mV f.s. Resolution 1 µV; measurable −20 mV to 20 mV; accuracy ±100 µV 50 mV f.s. Resolution 2.5 µV; measurable −50 mV to 50 mV; accuracy ±250 µV 100 mV f.s. Resolution 5 µV; measurable −100 mV to 100 mV; accuracy ±500 µV 200 mV f.s. Resolution 10 µV; measurable −200 mV to 200 mV; accuracy ±1 mV Strain Accuracy (23 ±5°C, LPF 4 Hz, 1 Year) 1,000 με f.s. Resolution 0.05 με; measurable −1,000 με to 1,000 με; accuracy ±9 με 2,000 με f.s. Resolution 0.1 με; measurable −2,000 με to 2,000 με; accuracy ±10 με 5,000 με f.s. Resolution 0.25 με; measurable −5,000 με to 5,000 με; accuracy ±25 με 10,000 με f.s. Resolution 0.5 με; measurable −10,000 με to 10,000 με; accuracy ±50 με 20,000 με f.s. Resolution 1 με; measurable −20,000 με to 20,000 με; accuracy ±100 με 50,000 με f.s. Resolution 2.5 με; measurable −50,000 με to 50,000 με; accuracy ±250 με 100,000 με f.s. Resolution 5 με; measurable −100,000 με to 100,000 με; accuracy ±500 με 200,000 με f.s. Resolution 10 με; measurable −200,000 με to 200,000 με; accuracy ±1000 με Internal bridge resistance precision tolerance ±0.01%; temperature characteristics ±2 ppm/°C (not included in measurement accuracy) > **Important:** The LR8450 and LR8450-01 cannot perform measurement on their own; one or more plug-in units or wireless units are required (sold separately). > **Important:** The LR8450-01 and each wireless unit emit radio waves. Use of radio waves is subject to licensing requirements in certain countries. Using it in a country or region other than those indicated may violate the law and may result in legal penalties for the operator. For the latest information about supported countries and regions, please visit the Hioki website. > **Important:** Always use HIOKI optional storage media. Proper operation is not guaranteed when using storage media from other manufacturers, and may prevent the product from saving and loading data properly. > **Important:** Even in good wireless communication conditions (low interference), the sampling-timing between wireless devices may shift about 20 ms; in bad wireless conditions the shift will be much worse. > **Important:** The wireless unit buffer memory holds up to 5 min. of measurement data during a communications interruption; however, data collected using the Logger Utility software measurement cannot be restored in this manner. > Usage tip: pair the logger with HIOKI optional storage media (SD memory cards Z4001 or Z4003, or USB drive Z4006), as guaranteed save/load operation is specified with HIOKI media. > **Important:** Channels are isolated from each other with semiconductor relays. Never allow a voltage exceeding the product specifications (for example a lightning surge) to be applied across channels, as doing so may cause the semiconductor relays to short. > **Important:** Z3230 Wireless LAN Adapter: the LR8450/LR8450-01 instrument takes two adapters; each wireless unit takes one. > Recommended pairing: humidity measurement uses the HIOKI Z2000 Humidity Sensor together with the U8550, U8551, U8552, or LR8531 units. ## About this New unit This is a brand-new, factory-sealed unit, supplied exactly as it arrives from the manufacturer and backed by the full manufacturer warranty. For the exact configuration, available options, included accessories, or current lead time for your application, our Test Architects can confirm the details before you order. ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application. **Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.** ## Details - **Price:** 1092.0 USD - **Vendor:** Hioki - **Type:** Data Log - **Tags:** Data Logger, Hioki, Manufacturers, Meters & DAQ, product_manual_group_3, Product_new ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 1092.00 USD | In stock | ## Images - Hioki U8554 Strain Unit Plug-in Module (5-Channel, 1 ms) for LR8450 Memory HiLogger --- > Source: [ValueTronics](https://valuetronics.com/products/u8554-hioki-data-logger-new) > Updated: 2026-06-20