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How long can a thermistor wire be?
Maretron thermistor probes come with 6′ long wires. Yes, you can extend Maretron TMP100 sensor wires to complete temperature sensing applications throughout a vessel. In many applications technicians have extended thermistor wires up to 100 feet to measure temperatures in separate compartments throughout a vessel.
Why does the length of wire affect voltage drop?
This voltage drop occurs because wires have resistance. Long lengths of wire have more resistance than short lengths. Thus, long lengths of wire will cause a larger voltage drop than shorter lengths.
What is the accuracy of NTC thermistor?
Of the basic sensor types, an NTC thermistor’s ability to achieve the highest accuracy is within the -50°C to 150°C range, and up to 250°C for glass encapsulated thermistors. Accuracy ranges from 0.05°C to 1.00°C.
What is the maximum length for 4-20ma signal cable?
RE: 4-20mA Distance limits There is no set length for a 4-20ma circuit. A 4-20ma circuit has a voltage source transducers and wire resistance. Each transducer will drop some voltage. From the voltage of the power supply, subtract the voltage demands of each transducer at 20ma.
Does cable length affect signal quality?
When it comes to signal loss over longer cable lengths, the basic rule of thumb is that a 50-foot cable can experience noticeable signal loss, and a 100-foot cable can drop as much as one-third of the original signal. Therefore, your 15-foot cable shouldn’t be long enough to introduce that sort of problem.
What happens when we increase the length of wire shorten the length of wire?
When the length of wire is longer, the current has to travel more distance and face more obstacles. With the length, resistance increases. The space of the elctrons to travel increases when cross sectional area is increased.
How can I adjust the accuracy of my NTC sensor?
By taking the resistance of the wire you will add, along with the resistance range of the NTC sensor, you can adjust for any accuracy issues. Simply subtract the wire’s resistance (voltage drop over it) from the NTC Sensor’s reading.
How does the stc-1000 temperature controller work?
I’m using an off-the-shelf STC-1000 temperature controller, popular with homebrewers, that uses an NTC sensor to read temperature and switch on a relay to cool or heat when the sensed temperature exceeds the set limit. I needed the 2m cable of the sensor to be longer, so I extended it by 3m.
Is the NTC thermistor available in a smaller size?
The smaller the sensor the faster the response. A discrete sensor will respond faster than the same sensor packaged inside a metal housing. Typical response times for a Series I NTC thermistor sensor is <15 seconds. Q: Are NTCs available in a smaller size?
Can a NTC be used in a high temperature application?
A: The rule of thumb is to use a low resistance sensor for a low temperature application and a high resistance sensor in a high temperature application. The goal is to have a working resistance value in your temperature range of interest. Q: Can NTCs be used in cryogenic applications?