Gas Sensors / Mixers / Pumps / Other Sensors:

Q-S161 RH / Temperature Sensor

Qubit Systems' combined Q-S161 RH / Temp Sensor allows simultaneous measurements of Relative Humidity and Gas Temperature at the RH Sensor. Water Vapor concentration can then be calculated in absolute units. No calibration is needed if used with C901 Logger Pro Software and the associated calibration files (factory calibrated). We recommend the use of C610 LabQuest Mini Data Acquisition Interface with Q-S161 for logging Relative Humidity of a Gas and the Temperature at the RH Sensor.

The Q-S161 RH / Temp Sensor has the Relative Humidity Range from 0 to 100% with 1% Resolution and Temperature Range from 5 to 60°C with Resolution of 0.01°C.

The Q-S161 RH/Temp Sensor is ideal for Transpiration Measurements in an Open-Flow Gas Exchange System. It comes with our Q-Box CO650 Plant CO₂ Analysis Packages and Q-Box SR1LP Soil Respiration Package.

It may also be used to study water loss from Animals or to observe RH Levels in Environmental Chambers

1. Features:
2. Simple operation
3. Two Analog Outputs (RH and Temp)
4. Flow-through RH Gas Analyzer
5. Two Valve Adjustments of In and Out Gas Flow
6. 1LPM Max Flow (No Load)

1. Applications:
2. Leaf Transpiration Measurements
3. Monitoring of RH in Environmental Chambers
4. Studies of Water Loss from Animals
5. Soil Moisture Loss Studies

1. Specifications:
1. RH Sensor Specifications:
2. Thermoset Polymer-based Capacitive Sensor
3. Linear Voltage Output vs %RH
4. Low Power Design
5. Accuracy: ±2% RH, 0-100% RH Non-condensing, 25°C
6. Linearity: ±0.5% RH Typical
7. Hysteresis: ±1.2% of RH Span Maximum
8. Repeatability: ±0.5% RH
9. Response Time: 15s in slowly moving (200ml/min) gas @25°C
10. Stability: ±1% RH Typical at 50% RH in 5 Years
11. Range: 0 to 100% RH, Non-condensing
12. Operating Temperature Range: 5°C to 60°C
13. Temperature Compensation: True RH = Sensor RH/(1.0546-0.00216T) T in °C
    (True RH = Sensor RH/(1.093-0.0012T) T in °F)
14. Chemically Resistant
15. 0%RH V_out: 0.200V
16. 100%RH V_out: 4.800V
17. Slope = 21.739, Offset: -4.3478
18. Warranty: 1 year
1. Temperature Sensor Specifications:
2. NTC Chip Thermistor, Non-Linear Response
3. Use Steinhart Equation in software for degree Celsius reading:
   1/(0.000903+0.000226×ln((Volts)×2000000)/(25×5-Volts))+1.11E-007×(ln((Volts×2000000)/(25×5-Volts)))³)-273.15
4. Accuracy: ±0.2C
5. Range: 5°C to +60°C
2. Power Requirements: 12V DC, 0.1A
3. Dimensions (cm) (H × W × D): 5.5 to 9.5 × 9.5 × 17
4. Weight: 900g