SNiP-AT for Ambient Temperature
The SNiP-AT is a 'Sensor Node Integrated Package' for LoRaWAN communication of real-time ambient temperatures in soil, air or liquid for continuous environmental monitoring.
The SNiP-AT
The base SNiP-AT integrates 1x AD-NODE and 1x THERM-EP Epoxy Thermistor Sensor to a site’s unique network, communication and power requirements.
The THERM-EP Epoxy Thermistor Sensor is an epoxy embedded thermistor, ideal for high quality low cost temperature measurement in soil, air or liquid.
See Further Specifications on the AD-NODE
See Further Specifications on the SE-100 Photometric Sensor
For complete monitoring solutions, the THERM-EP is used in combination with the MP406 soil volumetric moisture content sensor, tensiometers for soil water potential, ICTO2 soil oxygen sensor, or the ICT International automatic weather station.
Applications:
- Soil monitoring
- Climate control
- Concrete monitoring
- Explosive testing
AD-NODE: For High Resolution Analogue & Digital Sensors
The AD-NODE is designed for those requiring precision in their analogue and digital measurements. With a 24-bit ADC, the AD-NODE supports two RTDs, a 0–10V with compressing range and a 4–20mA input. Each of the four dry-contact digital inputs is capable of simultaneously sampling at 1 kHz, with periodic reporting. Settings on the device can be altered remotely via LoRaWAN™ or locally via USB.
- LoRaWAN™ low-power long-range connectivity
- 2x 24-bit RTD
- 1x 24-bit Voltage input (0-10 V with compressing range)
- 1x 24-bit 4-20 mA
- 4x 32-bit dry-contact counting digital inputs, 2 x digital outputs
- 400 Hz 3-Axis Accelerometer
- 3 x AA Lithium Energizer battery
- Fully reconfigurable via LoRaWAN™ downlinks
THERM-EP Epoxy Thermistor Sensor
The epoxy temperature sensors (THERM-EP) are high quality, low cost sensors for measurement of soil, air or liquid temperature. The sensor consists of a thermistor embedded in a protective epoxy body. THERM-EP sensors can be used in a wide range of applications from concrete monitoring, explosive testing, as well as soil monitoring and climate control. THERM-EP has a measurement range between -40°C and +80°C. Standard cable lengths are 5m, 30m and 50m however custom length cables are available.
Features
- Measurement range between -40°C and +80°C
- Wide range of applications
- For measurement of soil, air or liquid temperature
| 1. Electrical Characteristics | ||||
| Item | Symbol | Test Condition | Performance | Unit |
| 1.1 Rated Resistance | R25 °C | + 25±0.05°C | 10±1% | k Ohms |
| 1.2 B value | B25/85 | + 25±0.05°C, 85±0.05°C |
3990±1% | k |
| 1.3 Time constant | t | In well stirred water | <=11 | sec |
| 1.4 Dissipation factor | s | In still air | >=2.2 | mW/°C |
| 1.5 Voltage withstanding | U | AC1500V (Peak value) | No destroy or spark | V |
| 1.6 Insulation resistance | Ri | DC500V | >=100 | M Ohms |
| 1.7 Max.power | Pmax | Ambient Temp. +25°C | <=0.1 | mW |
| 2. Reliability test | 3. Operation Notice |
| 2.1 Intensity: Fix the probe, pull the lead by the striped wire end with 10 N force for ± 1sec. No visible damage. | 3.1 Application: Temperature measure and control. |
| 2.2 High Temp. Store (in air) 80±3 °C 100 h Delta R25/R25 <= 3% |
3.2 Operating Temp. Range: -40°C~+80°C |
| 2.3 Low Temp. Store (in air) -40±3 °C 1000h Delta R25/R25 3% |
3.3 Avoid measurement error caused by self heating with excess current. |
| 2.4 Heat and Humidity Stability 40±2°C 92%RH~98%RH 240h Delta R25/R25 3% |
3.4 Avoid excessive heat shock, the hot air blow should be at least 10 mm from the probe, in cases when a heat shrink protection tube needs to be attached. |
| 2.5 Temperature Shift -50±3 °C X 30min 105±3 °C X 30min 5 times Delta R25/R25 <= 3% |