NTC Type MA Specifications

MA100

Designed for use in catheter assemblies, these sensors

are available with nominal resistance values of 2252,

3000, 5000, and 10,000 Ω at 77°F (25°C). Close monitor-

ing of manufacturing processes allow Thermometrics

to maintain tight interchangeability tolerances with

volume production. Typical design parameters are rep-

resented in Assembly Type table.

0.030 in (0.76 mm) (10 KΩ only) and 0.050 in(1.27mm)

diameters available with kapton sleeve only.

0.070 in (1.78 mm) diameter normally supplied with

molded plastic tip.

MA200

Intermittent body temperature measurements are

common practice in all phases of patient care. This

assembly is ideally suited for the disposable cover oral

and rectal fever thermometers in use today. It features

rugged construction with tip sensitive shaft assemblies

exhibiting resistance values of 2252, 3000, 5000, and

10,000 Ω at 77°F (25°C). Refer to Assembly Type table

for typical design parameters.

MA300

Routine continuous patient temperature monitoring is

now feasible by using the convenience of the patient’s

skin site as an indicator of body temperature. The stain-

less steel housing used is suitable for both reusable and

disposable applications, while maintaining maximum

patient comfort . Nominal resistance values of 2252,

3000, 5000, and 10,000 Ω at 77°F (25°C) are available.

Refer to Assembly Type table for typical design param-

eters.

Assembly Type

Assembly

Type

MA100

MA200

MA300

Standard

Diameters

(D)

0.030 in (0.762 mm)

0.050 in (1.27 mm)

0.070 in (1.78 mm)

0.080 in (2.03 mm)

0.156 in (3.96 mm)

0.375 in (9.52 mm)

Body

Length (L)

3/8 in (9.52 mm)

3.75 in (95.25 mm)

N/A

Lead Length

(A)

3/8 in (9.52 mm)

3.75 in (95.25 mm)

N/A

Tolerance

See Tolerance Code

and Temperature

Table

See Tolerance Code

and Temperature

Table

See Tolerance Code

and Temperature

Table

Wire Gauge

20, 30, 32, 38, AWG

30 AWG

30 AWG

Standard

Wire

Insulation

*Heavy Isomid

*Medical Grade PVC

*Polyurethane with

Nylon Overcoat

PTFE

Medical Grade PVC

PTFE

Body

Material

Molded Plastic or

Kapton Sleeve

Lexan Shaft

Aluminum Tip

Stainless Steel

Nominal R Values @ 77°F (25°C)

2252 Ω, 3000 Ω, 5000 Ω, 10,000 Ω

(for all three types)

Series

Still Air

Still Water*

MA100

Catherter Assembly

15 seconds

2.0 seconds

MA200

Oral-Rectal Assembly

35 seconds

0.6 seconds

MA300

Skin Surface Assembly

45 seconds

2.0 seconds

*Response time provided is for assembly plunged from 77°F (25°C) air to 41°F (5°C) water.