The Opsens Solutions OTG-M Series fiber optic temperature sensors (OTG-M170, OTG-M220, OTG-M360, OTG-M420, OTG-M600, OTG-MPK5, and OTG-MPK8) deliver remarkable performance. The temperature transduction method of the OTG-M Series sensors is based on a tried-and-tested technology based on the temperature-dependent bandgap of GaAs crystal.
The small GaAs crystal located at the optical fiber’s tip simplifies tip measurement applications. The reaction time and sensor diameter (OD), which are specified in the specifications section, are the two elements that distinguish the OTG-M series models.
When paired with OpSens’ SCBG (Semiconductor Bandgap) signal conditioning technology and the benefits of fiber optic, the OTG-M Series provides unparalleled consistency and dependability in extreme conditions such as high levels of MR, RF, EM, and microwave field settings.
OpSens SCBG signal conditioners are all compatible with the OTG-M Series and built with industry-standard optical fiber. This compact yet durable fiber optic temperature sensor may be adjusted to match a range of OEM or customer-specific applications by using a variety of optical cables and sheath options.
Key features
- High repeatability
- Innately secure
- Microwave and EMI, RFI, RFI immunity
- Simple and sturdy design
- OEM-style and modified models
- High precision
Applications
- Dynamic temperature monitoring
- Environments such as microwave, RF, and EM
- High-voltage environment
- A low-cost disposable sensor
- Applications for small-size sensors
OTG-M series
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 |