Thermistor Pod

Thermistor Pod

The Thermistor Pod is suitable for biological temperature measurements such as skin temperature measurements, nasal temperature and respiration detection. This unit is a compact signal conditioner designed to work with 10 k thermistors in the range 5 °C to 45 °C for biological temperature measurements. A delta temperature mode allows an offset to be applied so small changes in temperature can be observed.

Item# Description U.S. List Price Quantity
77-0038 Thermistor Pod, Model ML309
77-0092 Nasal Temperature Probe for Thermistor Pod ML309, Model MLT415/A
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The Thermistor Pod is suitable for biological temperature measurements such as skin temperature measurements, nasal temperature and respiration detection. This unit is a compact signal conditioner designed to work with 10 k thermistors in the range 5 °C to 45 °C for biological temperature measurements. A delta temperature mode allows an offset to be applied so small changes in temperature can be observed.


Transducer Capability:

The following transducers are suitable for use with the Thermistor Pod:

• MLT409/A Skin Temperature Probe

• MLT415/A Nasal Temperature Probe

System Compatibility:

The Thermistor Pod connects to any PowerLab hardware units with Pod ports (8-pin DIN inputs). PowerLab and MacLab (except 4s, 8s and 16s) units without Pod ports requires the FE305 Pod Expander.

The Thermistor Pod is supported by the following versions of LabChart and Scope software:

WINDOWS

• LabChart v3.4.8 or later

• Scope v3.6.3 or later

MACINTOSH

• LabChart v3.6.3 or later

• Scope v3.6.3 or later

Note: Earlier software versions do not support Pods.

Theory of Operation:

The thermistor transducer is fitted as one element in a full bridge circuit. Changes in the resistance of the thermistor element are converted to a voltage which is amplified to produce 50 mV/°C within the temperature range 5°C to 50°C. A 3-pole 10 Hz lowpass filter reduces noise bandwidth. A switchable offset circuit is used to provide a delta temperature mode for relative temperature measurement.

Stacking and Unstacking Pods:

Pods stack by clicking into place on top of each other. To separate stacked Pods, push the top Pod towards the back and then pull them apart from the back.
Specifications77-003877-0092
Cable Length EnglishCE3 ft
Cable Length Metric3 µV/°C90 cm
Certifications108 x 58 x 35 mm*na
Connector3-pin mini audio connector3-pin mini audio
DC Drift5 °C to 45 °C in absolute mode, Δ1 °C to Δ20 °C in five ranges with Delta Temp onSee product page for complete specifications
Dimensions H x D EnglishML3090.37 x 0.8 in
Dimensions H x D Metric50 mV/°C (0 mV = 25 °C)9.5 x 2.0 mm
Enclosure Size L x W x H Metric1*na
Input Connection TypeData Acquisition*na
Maximum Excitation~200 ms (for a full scale change in temperature). Overall response will be dependent on the thermal response of thermistor probe2 V
Measurement Ranges±0.2 °C absolute (25 °C to 45 °C)*na
Model50 °C overall (-5 °C to 45 °C absolute)MLT415/A
Operating Range10 kΩ at 25 °C0°C to 50°C Stability maintained with exposure below 70°C
Output Voltage~200 g*na
Package1
Product FamilyData Acquisition
Response Time*na
Temperature Accuracy*na
Temperature Offset Range*na
Thermal Response TimeStill Air: 15 sec

Still Water: 2.0 sec (plunged from 25°C air to 5°C water)
Thermistor Type*na
TolerancesTemp. Range (°C), Tolerance (±°C)

[0 , 20], 0.20

[20 , 35], 0.15

[35 , 39], 0.10

[39 , 45], 0.15

[45 , 50], 0.20
Weight Metric*na
Wire30 AWG (gauge), medical grade PVC (insulation)