LRHT-3 SITE-LOG Relative Humidity and Temperature Data Logger
The SITE-LOG LRHT-3 (with an external 3-foot sensor probe) is a 2-channel, batterypowered,standalone data logger designed for accurate and reliable monitoring of temperature and relative humidity. It features an internal memory capacity of up to 8 MB, storing data securely in non-volatile flash memory for easy retrieval at a later time.
Built with a durable aluminum enclosure and a conformally coated PCB, the LRHT-3 offers outstanding performance and protection in harsh industrial environments.
Plug & Play USB port and versatile custom equation simplify communications and engineering unit conversion. High-precision digital temp & RH sensor makes it well suited for science and laboratory applications
where precise and accurate measurements are critical.
Features:
- 8 megabyte memory size
- Both USB and serial interfaces with auto baud rate of up to 115200 bps
- Sensirion RH Digital Sensor
- Powerful software for configuration, downloading, plotting, analysis and alarm reporting
- Configurable alarm controls/excitation controls
- Wide sampling interval selections (from 1 second to 12 hours)
- Rugged aluminum enclosure
- Coated PCB to protect against moisture, corrosion and mildew.
Documents:
SITE-LOG Relative Humidity Data Logger (LRHT-3) Specifications
Want to remotely access this data logger? Check out SMART-HUB
| General | |
|---|---|
| Product Name | SITE-LOG Relative Humidity Data Logger |
| Model | LRHT-3 |
| Inputs | |
| Channels | Relative humidity (0 ~ 100% RH) Temperature (-40°C ~ 70°C, -40°F ~ 158°F) |
| Accuracy | Temperature:+/- 0.2°C at 25°C Relative humidity channels: +/-2% (20% - 80% RH) |
| Sensor Probe | 3-foott long, terminal block connector |
| Alarms | |
| Channel Alarms | Two editable alarm thresholds per channel. |
| Alarm Output | ALARM1 & A2/E terminal strips can be configured as alarm outputs. Alarm-On: MOSFET(N-Channel) switch on Alarm-Off: MOSFET(N-Channel) switch off Max Power: 200mA @ 24VDC |
| Alarm-On Delay | Programmable 0 - 10 minutes delay with 1-minute increment. |
| Alarm Indicator | On-board LED becomes red when in alarm condition. |
| On-board Memory | |
| Size | 8 Megabytes (4MB readings). |
| Data Retention | Over 20 years. |
| Sampling | |
| Sampling Interval | 1 second to 12 hours programmable. (external power supply required if interval less than five seconds) |
| Logging Mode | Stop recording or FIFO when memory is full. |
| Logging Activation | Programmable instant, start delay or field push button activation. |
| Communications | |
| Interface | USB (Mini-USB-B) (USB-A-mini USB-B Cable included) AUX(RJ11) for TTL level RS232 communications. |
| Baud Rate | Auto-detect baud rate from 2400 to 115200 bps on both USB and AUX. |
| Battery | |
| Power | Built-in 3.6V Lithium Battery. |
| Battery Life | 5 years based on 1 minute sampling interval. |
| Software | |
| SiteView (Sold separately) | Configuration, downloading, plotting, real-time view, custom calibration and custom equation. |
| Software Requirement | Computer with 1.0 GHz or faster processor 1 GB Memory or higher 10 GB of available hard-drive space or higher Windows XP with SP2 or later, Vista, Window 7,8,10 At least one USB port or one COM port. |
| Physical | |
| Material | Aluminum enclosure. |
| PCB Treatment | Conformal coating. |
| Dimension | 88 X 64.2 X 24 mm (3.46 X 2.53 X 0.95 inches). |
| Weight | 200g |
| Mounting | Probe/wall-mount holes for hanging/mounting. |
| Others | |
| LED Indicator | Tri-Color LED: (can be disabled for power saving) Normal Sampling: light green when sampling. Alarm: red when sampling. Low Battery: amber when sampling. |
| Excitation Control | A2/E terminal strip can be configured as excitation control output for driving the power of connected devices. Warm-up delay interval settings: 10 to 240 seconds with 10-second increment. |
| Operating Environment | -40 ~ +70 °C (-40 °F ~ 158 °F), 0 ~ 95% RH non-condensing. |
| Clock Accuracy | ±1 mintue per month. |
| Approval | CE, FCC |
Logger Memory Capacity
| Sampling Interval | Enabled Channel | Logging Capacity |
|---|---|---|
| 1 minute | 1 | 8 years |
| 1 minute | 2 | 4 years |
| 10 seconds | 1 | 485 days |
| 10 seconds | 2 | 242 days |
| 1 second | 1 | 48 days |
| 1 second | 2 | 24 days |
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