Thermometrics BR Series of Glass-Encapsulated Bead Thermistors consists of glass-encapsulated bead thermistors on fine diameter (alloy or platinum) lead wires. Rugged glass encapsulation provides hermetic seal and better strain relief than glass-encapsulated bead thermistors. Suitable for self-heated applications, such as liquid level sensing or gas flow measurement. Recommended for applications where the customer will perform further assembly operations.
Low cost temperature measurement, control and compensation
Self-heated applications, such as liquid level sensing or glass flow measurement
Applications where the customer will perform further assembly operations
Fast thermal response times
Rugged glass encapsulation provides hermetic seal and better strain relief than glass-encapsulated bead thermistors
Long term stability
Unaffected by severe environmental exposures, including nuclear radiation
Normal operating/storage temperatures range from -112°F (-80°C) to: 221°F (105°C) for Material system E0, 392°F (200°C) for Material systems A1 through A4, 572°F (300°C) for Material systems A5 through D17
Intermittent operation to 600°C
Thermistor Series:
BR11
BR14
BR16
BR23
Body Dimensions
Nominal Diameter
0.011 in (0.28 mm)
0.014 in (0.36 mm)
0.016 in (0.41 mm)
0.023 in (0.58 mm)
Max Diameter
0.012 in (0.30 mm)
0.016 in (0.41 mm)
0.017 in (0.43 mm)
0.025 in (0.63 mm)
Max Length
0.0242 in (0.610 mm)
0.032 in (0.81 mm)
0.034 in (0.86 mm)
0.056 in (1.46 mm)
Lead Wires
Nominal Diameter
0.0007 in (0.02 mm)
0.0011 in (0.03 mm)
0.0011 in (0.03 mm)
0.002 in (0.05 mm)
Max Lead Length
0.312 in (7.9 mm)
Lead Material
Platinum Alloy
Available Cuts
"K" adjacent or "P" opposite
Thermal Time Constant
Still Air @ 25°C (77°F)
0.8 seconds
1 second
1.2 seconds
1.7 second
Plunge into Water
12 msec
14 msec
16 msec
40 msec
Dissipation Constant
Still Air @ 25°C (77°F)
0.065 mW/°C
0.10 mW/°C
0.12 mW/°C
0.18 mW/°C
Still Water @ 25°C (77°F)
0.33 mW/°C
0.50 mW/°C
0.60 mW/°C
0.90 mW/°C
Power Rating (In Air)
Max Power Rating
0.007 W
0.015 W
0.015 W
0.020 W
100% Max to:
125°C (257°F)
Derated to 0% at:
300°C (572°F)
Options
Non-standard resistance tolerances
Non-standard resistance values
Reference temperature(s) other than 77°F (25°C)
Mounting in special housings or enclosures
Longer continuous leads
Welded or soldered extension leads-specify lead material, diameter, length, and insulation, if any
Solderable or weldable/solderable leads
Leads can be pre-tinned or treated for improved soldering
Calibration
Interchangeable pairs or sets, R-vs-T curve matching
Special aging and conditioning for high reliability applications
Thermistor Series:
BR32
BR42
BR55
Body Dimensions
Nominal Diamater
0.032 in (0.81 mm)
0.042 in (1.16 mm)
0.055 in (1.41 mm)
Max Diameter
0.033 in (0.84 mm)
0.046 in (1.2 mm)
0.060 in (1.5 mm)
Max Length
0.084 in (2.1 mm)
0.095 in (2.4 mm)
0.120 in (3 mm)
Lead Wires
Nominal Diameter
0.003 in (0.08 mm)
0.004 in (0.10 mm)
0.004 in (0.10 mm)
Max Lead Length
0.312 in (7.9 mm)
Lead Material
Platinum Alloy
Available Cuts
"K" adjacent or "P" opposite
Thermal Time Constant
Still Air @ 25°C (77°F)
4.5 seconds
5 seconds
7 seconds
Plunge into Water
90 msec
140 msec
200 msec
Dissipation Constant
Still Air @ 25°C (77°F)
0.285 mW/°C
0.33 mW/°C
0.5 mW/°C
Still Water @ 25°C (77°F)
1.4 mW/°C
1.65 mW/°C
2.50 mW/°C
Power Rating (In Air)
Max Power Rating
0.035 W
0.042 W
0.050 W
100% Max to:
150°C (302°F)
Derated to 0% at:
300°C (572°F)
Options
Non-standard resistance tolerances
Non-standard resistance values
Reference temperature(s) other than 77°F (25°C)
Mounting in special housings or enclosures
Longer continuous leads
Welded or soldered extension leads-specify lead material, diameter, length, and insulation, if any
Solderable or weldable/solderable leads
Calibration
Interchangeable pairs or sets, R-vs-T curve matching
Special aging and conditioning for high reliability applications
