For this model, the default parameters:

- Temperature Measuring Range: -50~120C

- Humidity measuring range: 0~99%RH

- One channel temperature record

- One channel humidity record

- Record capacity: Max 30,000 point

- With upper/lower temp. limit alarm function

- With USB/RS485 port for data transmitter

- With large LCD display for data check

- With 2200mAH battery inside

Option function  any needed please contact with me 

1.can expand 4 channel.(two channel temperature and two channel humidity )

2.SMS alarm function

RC-40 Temperature and humidity Data Logger, Segment LCD display, one channel temperature and one channel humidity as its standard configuration, it could be expanded to four channels, temperature or humidity mode optional, internal rechargeable lithium battery, RS-485 network can be set up, support the U disk copy and USB data transmission.

Specification

1. Monitor and record temperature and humidity data
2. Temperature record cycle could be flexibly adjusted
3. Large record capacity. If record every 15 minutes, it could record for more than ten months.
4. Big LCD screen can simultaneously display system clock, current work status, record capacity and recorded data.
5. The upper/lower temperature alarm temperature could be separately set. It will alarm when the temperature exceeds the upper or lower limit.
6. It has USB /U disk interface for convenient data copy and save.
7. Form a Local Area Network by RS-485 interface to monitor several data loggers' temperature.
8. It is matched with our RC-40 data processing software which could real-time monitor, upload, print and manage the data
9. It has two alarm output: Buzzer and alarm relay with rechargeable standby batteries, when the power is cut off, it could keep running for ninety days after fully charged.