Danfoss MBT 3252 Data sheet

Data Sheet

Temperature sensor

Type MBT 3252

Heavy-duty industrial application temperature sensor.

Heavy-duty temperature sensor for controlling cooling water, lubrication oil, hydraulic oil and refrigeration plants within general industry.

This temperature sensor is based on a standardised Pt 100 element, which gives a reliable and accurate measurement.

The changeable measuring insert is equipped with a silicone cable, which makes the sensor very resistant towards vibrations.

The MBT 3252 is equipped with a B-head as standard.

If needed, a transmitter (MBT 9110) can be ordered as an integrated part of the MBT 3252 sensor.

Features:

• Gaseous or liquid media, e.g. air, gas, vapour, water or oil

• Resistance or 4 – 20 mA signal

• Up to 200 °C media temperature

• Pt sensing element with silicone cable

• Can be used with 2 or 3 wire connections

• Interchangeable measuring insert

• Available with built-in transmitter

• Also available in a marine version as MBT 5252

AI201986428009en-000301

Temperature sensor, Type MBT 3252

Product speci€cation

Technical data

Table 1: General data

Features		Description
Measuring range		-50 – 200 °C
Sensing element		Pt 100
Protection tube		ø10 × 2 mm
	Air	25 m/s
Permissible media velocity	Steam	25 m/s
	Water	3 m/s

Table 2: Connection

Process connection	G ½ A
Max. tightening torque	50 Nm
Width across …ats	HEX 27

Table 3: Response time

				Indicative response times
	Type	Protection tube	Water 0.2 m/s			Air 1 m/s
			t0.5	t0.9	t0.5	t0.9
	MBT 3252	ø10 × 2 mm	14 s	42 s	110 s	390 s

Table 4: Mechanical and environmental speci€cations

	Features	Description
	Max. temperature(1)	Ambient:	90 °C for sensors without temperature transmitter
		Transmitter:	85 °C for sensors with temperature transmitter
	Sensor tolerance	EN 60751 Class B: ± (0.3 + 0.005 × t)
		t = temperature of medium, numerical value
	Vibration stability	Shock:	100 g / 6 ms
		Vibrations:	4 g sine function 5 – 200 Hz, measured acc. to IEC 60068-2-6
	Enclosure	IP65 according to IEC 60529
	Cable entry B-head	Pg 16
	Temperature transmitter MBT 9110	Supply voltage:	8 – 35 V DC
		Output:	4 – 20 mA

(1)The temperature of the transmitter is in…uenced by media temperature, ambient temperature and ventilation in the surroundings. If the temperature of the transmitter exceeds the max. allowed temperature the, transmitter must be placed in a separated enclosure, as described in the separate data sheet for MBT 9110.

Table 5: Materials

Features	Description
Protection tube in contact with media	W.no. 1.4571	(AISI 316 Ti)
Process connection in contact with media	W.no. 1.4404	(AISI 316 L)
Extension length	W.no. 1.4571	(AISI 316 Ti)
Union nut	Nickel plated brass
Connection head	Die cast aluminium

© Danfoss | Climate Solutions | 2021.02

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