OpSens' OTG-M Series (OTG-M170, OTG-M220, OTG-M360, OTG-M420, OTG-M600, OTG-MPK5, and OTG-MPK8) fiber optic temperature sensors provide industry-leading perfomance. The temperature transduction process for the OTG-M Series sensors utilizes a well-established method based on the temperature-dependent bandgap of the GaAs crystal.
It is suitable for tip measurement applications because of the small sensing GaAs crystal that is placed at the optical fiber’s tip.
The reaction time, encapsulation material, and the diameter of the sensor (OD), which are detailed in the specifications section for each sensor, are what differentiate each model of the OTG-M series from the others.
The OTG-M Series provides unparalleled repeatability and dependability in the most challenging conditions, including as high levels of EM, MR, RF, and microwave field environments when combined with OpSens’ SCBG (Semiconductor Bandgap) signal conditioning technology and now with the advantages of fiber optic.
The OTG-M Series is designed using optical fiber that is industry standard and operates with all SCBG signal conditioners from OpSens. This small, strong fiber optic temperature sensor may be customized for use in OEM applications or customer-specific uses by offering a variety of optical cables and sheath alternatives.
Key Features
- Compact and durable design
- Customized and OEM versions
- Microwave and EMI/RFI/RFI immunity
- Outstanding precision
- Inherently safe
- Excellent accuracy
Applications
- RF, EM, and microwave settings
- Applications requiring small sensors
- Monitoring temperature variations
- Environments with high voltage
- Low cost disposable sensor
OTG-M (M170-M220-M360-M420-M600-MPK5-MPK8)
Fiber Optic Temperature Sensor

Image Credit: OpSens Medical
Specifications
Source: OpSens Medical
SENSOR MODEL |
OTG-M170 |
OTG-M220 |
OTG-M360 |
OTG-M420 |
OTG-M600 |
OTG-MPK5 |
OTG-MPK8 |
RESPONSE TIME |
≤ 35 ms |
≤ 50 ms |
< 100 ms |
< 200 ms |
200 ms |
< 225 ms |
< 500 ms |
SENSOR DIAMETER |
0.170 mm |
0.220 mm |
0.360 mm |
0.420 mm |
0.600 mm |
0.510 mm |
0.810 mm |
SENSOR TIP MATERIAL (TUBE) |
Bare fiber |
Polyimide |
Glass |
Polyimide |
Polyimide |
PEEK |
PEEK |
TEMPERATURE OPERATING AND CALIBRATED RANGE |
-40 °C to +250 °C (other ranges available upon request) |
ACCURACY |
± 0.8 °C or better for other temperature range |
OPERATING HUMIDITY RANGE |
0-100 % |
EMI/RFI SUSCEPTIBILITY |
Complete immunity |
CALIBRATION |
NIST traceable |
CABLE LENGTH |
1.5 meters standard (other lengths available) |
OPTICAL CONNECTOR |
LCA, ST, standard |
CABLE SHEATHING |
Teflon™ |
SIGNAL CONDITIONER COMPATIBILITY |
All Opsens Solutions’ GaAs (SCBG) signal conditioners |