g NTC THERMISTORS: TYPE MA DESCRIPTION: Our Biomedical Chip Thermistor assemblies are designed for use in applications involving both intermittent and continuous patient temperature monitoring. Repeatability and fast response are essential not only for the intermittent temperature requirements associated with oral and rectal fever measurements, but also with the continuous monitoring often necessary during induced-hypothermia and general anesthesia, or when employed in the care of infants and premature babies. Intensive care units along with recovery rooms have also adopted patient temperature as part of their vital sign monitoring procedures. Temperature monitoring for skin surface, tympanic, esophageal, foley catheters and biofeedback applications has also improved due to the high stability and tight interchangeable tolerances designed into each Thermometrics' Biomedical assembly. APPLICATIONS: A complete line of standard sub-assemblies is available, as shown in Figure 1; however, continuous research and development efforts within Thermometrics have resulted not only in these field proven designs, but in the development of our Unitherm Thermochip Thermistor designed exclusively for biomedical applications in the range of 0 C to 50 C. Although low in cost, these highly stable, precision thermochips provide the reliability, tight interchangeable tolerances, geometries, and fast response times required. To keep pace with this ever-improving biomedical market, our material system and processing parameters are closely monitored and improved to continually provide you with reliable, quality products. In addition, should you require it, Thermometrics employs a complete staff of experienced full-time applications engineers who welcome your inquiries, whether it's for assistance, or to help with your design requirements concerning new and existing applications. Crown Industrial Estate, Priorswood Road Taunton, Somerset TA2 8QY UK Tel +44 (0) 1823 335200 Fax +44 (0) 1823 332637 808 US Highway 1 Edison, New Jersey 08817-4695 USA Tel +1 (732) 287 2870 Fax +1 (732) 287 8847 967 Windfall Road St. Marys, Pennsylvania 15857-3397 USA Tel +1 (814) 834 9140 Fax +1 (814) 781 7969 TYPE MA Designed for use in catheter assemblies these sensors are available with nominal resistance values of 2252, 3000, 5000, and 10,000 ohms at 25 C. Close monitoring of manufacturing processes allow us to maintain tight interchangeability tolerances with volume production. Typical design parameters are represented in Table 1. NOTE: .030"(10K ohm only) and .050" diameters available with kapton sleeve only. .070" diameter normally supplied with molded plastic tip. 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 ohms at 25 C. Refer to Table 1 for typical design parameters. 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 stainless 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 ohms at 25 C are available. Refer to Table 1 for typical design parameters. TABLE 1 Assembly Type MA100 MA200 MA300 Standard Diameters D .030" .050" .070" .080" .156" .375" Body Length L 3/8" 3.75" N/A Lead Length A 24" 2" 24" Tolerance See Table See Table See Table 30 AWG 30 AWG Teflon Medical Grade PVC Teflon Lexan Shaft Aluminum Tip Stainless Steel Wire Gauge 28, 30, 32, 38 AWG Standard Wire Insulation *Heavy Isomid *Medical Grade PVC *Polyurethane with Nylon Overcoat Body Material Molded Plastic or Kapton Sleeve Nominal R Values @ 25C 2252, 3000, 5000, 10,000 Ohms THERMAL RESPONSE TIME (63% RESPONSE) Series RESISTANCE VS. TEMPERATURE Still Air Still Water* TEMP C 2252 OHMS 3k OHMS 5k OHMS 10k OHMS 103(Y) OHMS MA100 Catheter Assembly 15 sec. 2.0 sec. MA200 Oral-Rectal Assembly 35 sec. 0.6 sec. MA300 Skin Surface Assembly 45 sec. 2.0 sec. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 7352.90 6988.42 6643.38 6317.41 6009.39 5718.10 5442.68 5182.12 4935.54 4702.12 4481.09 4271.72 4073.33 3885.28 3706.99 3537.90 3377.47 3225.23 3080.70 2943.46 2813.11 2689.26 2571.54 2459.64 2353.22 2252.00 2155.69 2064.02 1976.76 1893.67 1814.51 1739.09 1667.22 1598.51 1533.20 1470.89 1411.58 1354.91 1300.77 1249.08 1199.72 1152.57 1107.52 1064.47 1023.30 983.97 946.02 909.99 875.92 842.96 811.42 9795.16 9309.62 8849.98 8415.73 8005.39 7617.37 7250.46 6903.35 6574.88 6263.93 5969.48 5690.57 5426.28 5175.78 4938.27 4713.01 4499.30 4296.48 4103.95 3921.13 3747.48 3582.49 3425.68 6276.61 3134.84 3000.00 2871.70 2749.59 2633.34 2522.10 2417.19 2316.73 2220.99 2129.52 2042.50 1959.39 1880.47 1804.94 1732.82 1663.96 1598.20 1535.39 1475.38 1418.03 1363.17 1310.80 1260.25 1212.24 1166.85 1122.95 1080.93 16325.3 15516.0 14750.0 14026.2 13342.3 12695.6 12084.1 11505.6 10958.1 10439.9 9949.14 9484.28 9043.80 8626.30 8230.45 7855.01 7498.83 7160.80 6839.92 6535.22 6245.80 5970.82 5709.47 5461.01 5224.74 5000.00 4786.16 4582.64 4388.89 4204.34 4028.66 3861.22 3701.65 3549.20 3404.18 3265.65 3134.12 3008.23 2888.03 2773.26 2663.67 2558.99 2458.97 2363.39 2271.95 2184.66 2100.92 2020.40 1944.76 1871.59 1801.55 32650.5 31032.1 29499.9 28052.4 26684.6 25391.2 24168.2 23011.2 21916.3 20879.8 19898.3 18968.6 18087.6 17252.6 16460.9 15710.0 14997.7 14321.6 13679.8 13070.4 12491.6 11941.6 11418.9 10922.0 10449.5 10000.0 9572.32 9165.29 8777.79 8408.68 8057.31 7722.43 7403.29 7098.42 6808.36 6531.31 6265.75 6016.47 5776.05 5546.53 5327.34 5117.97 4917.94 4726.77 4543.91 4369.33 4200.84 4040.81 3889.51 3743.17 3603.10 29491.24 28157.49 26891.19 25688.61 24546.22 23460.72 22428.99 21448.12 20515.34 19628.07 18783.87 17980.43 17215.58 16487.30 15793.65 15132.82 14503.11 13902.89 13330.64 12784.92 12264.39 11767.75 11293.80 10841.39 10409.44 10000.00 9602.89 9226.41 8866.62 8522.70 8193.89 7879.43 7578.65 7290.88 7015.50 6751.92 6499.57 6257.93 6026.49 5804.78 5592.33 5388.73 5193.56 5006.43 4826.98 4654.86 4489.73 5331.28 4179.20 4033.22 3893.05 * Response time provided is for assembly plunged from 25C air to 5C still water TOLERANCE CODE AND TEMPERATURE RANGE Tolerance Code Temperature Range C A B C C C C 0-20 .15 .2 .25 20-35 .1 .15 .2 35-39 .05 .1 .15 39-42 .075 .15 .2 42-45 .1 .15 .2 45-50 .15 .2 .25 DATA: Our biomedical series thermistor chips and sub assemblies are designed to be interchangeable over a 0C to 50C range. Best overall stability is maintained when exposure and storage temperatures remain below 70C. CODING: MA XXXXX - XXX - X TOLERANCE CODE: REFER TO TABLE RESISTANCE CODE:* 232 = 2,252 302 = 3,000 502 = 5,000 103 = 10,000 103(Y) = 10,000 OHMS OHMS OHMS OHMS OHMS *Refer to Resistance vs. Temperature Table STANDARD ASSEMBLIES 100FA - Series 100, .070" diameter molded plastic tip, 30 gauge PVC insulated ribbon cable. 100FD - Series 100, .070" diameter molded plastic tip, 32 gauge bifilar heavy isomid insulation. 100DD - Series 100, .050" diameter kapton sleeve with 32 gauge bifilar heavy isomid insulation. 100BF - Series 100, .030" diameter kapton sleeve with 38 gauge bifilar heavy isomid insulation. 200LC - Series 200, .156" diameter aluminum tip, 30 gauge teflon leads. 300TA - Series 300, .375" diameter stainless steel cup, 30 gauge PVC insulated ribbon cable. 300TB - Series 300, .375" diameter stainless steel cup, 30 gauge teflon insulated ribbon cable. 100GG - Series, 100, .080" diameter molded plastic tip, 28 gauge kynar insulated twisted pair.