Fluidcontrol
Level and temperature
switch
Nivotemp NT M, NT MD
DE100211
11/2023
page 1 / 9
Bühler Technologies GmbH, Harkortstr. 29, D-40880 Ratingen
Tel. +49 (0) 21 02 / 49 89-0, Fax: +49 (0) 21 02 / 49 89-20
E-Mail: fluidcontrol@buehler-technologies.com
Internet: www.buehler-technologies.com
In hydraulics and lubrication technology the fill level of oil tanks
needs to be monitored. Here, modern factory automation
requires compatible signals. The Nivotemp M series features a
group of devices for both monitoring the level as well as the
level and temperature in hydraulic or lubrication units.
NT M
Vessel connections G3/4, G1, flange or oval flange
Various plug options
Level and/or temperature control
Up to 4 switching outputs
Small, compact design
Proven and tested highly dynamic float system
Brass or stainless steel housing
NT MD
Vessel connections G3/4, G1 or oval flange
Fixed switching outputs for liquid level monitoring
LED display with status of switching outputs, 270° swivel
Standardised VDMA-based menu structure
Up to four programmable temperature switching outputs
Alternatively, continuous temperature output signal plus
freely programmable switching output
Switching output configurable as window or hysteresis
Switching output configurable as frequency output (1-100 Hz)
Min./max. value memory, logbook
Nivotemp NT M, NT MD
Technical Data NT M
Version MS VA Dimensions
Operating pressure: max. 1 bar * max. 1 bar
L1 = min. 40
L = 280 / 370 / 500 / max. 1000
L2 = min. 80
min. 50
59
G3/4 = SW 36
G1 = SW 41
3.5
* min. 80 with
2x temp. contact
G3/4 /
G1
Ø23.5
last contact
first contact
45
G3/4 = 16
G1 = 18
Ø4.5
2
~ 37
45
5
8
Ø52
43
Ø38
55
80
Ø55
Ø6.5
R13
Flange style
Oval flange
(NBR
seal)
Operating temperature: -20 °C to +80 °C -20 °C to +80 °C
Float: SK 161 SK 161
Min. fluid density: 0.80 kg/dm³ 0.80 kg/dm³
Lengths (all versions): 280, 370, 500 mm (standard)
variable to max. 1000 mm
Weight at L=500 mm: approx. 300 g approx. 350 g
* max. atmospheric for PA oval flange
Material
Float: NBR NBR
Immersion tube: Brass 1.4571
G3/4 connection: Brass 1.4571
G1 connection: Brass Brass
via adapter
Flange connection: Aluminium --
Oval flange: PA VA/brass
via adapter
Level switching output K8 W9
Max. number 4 3
Function: NO/NC* Change-over contact
Max. voltage: 230 V AC/DC 48 V AC/DC
Max. switching current: 0.5 A 0.5 A
Max. contact load: 10 VA 20 VA
Min. contact spacing: 40 mm 40 mm
*NO = falling open / NC = falling close
Optional temperature
Temperature contact: TM xx
Max. voltage: 230 V AC/DC
Max. switching current: 2 A
Max. contact load: 100 VA
Function: NC NO
Switching point °C: 50/60/70/80 50/60/70/80
Switching point tolerance: ± 5 K ± 5 K
Max. hysteresis: 18 K ± 5 K 26/35/40/45 K ± 5 K
Temperature sensor
Pt100: DIN EN 60 751 (tolerance ± 0.8 °C)
Analogue output: See "Technical Data NT M with Analogue Output for
Temperature"
Adapter
OV: Adapter to oval flange incl. seal and locking nut
G1: Adapter G3/4 to G1
2 Bühler Technologies GmbH We reserve the right to amend specification. DE100211 ◦ 11/2023
Nivotemp NT M, NT MD
NT M ordering instructions
Model key
Model designation
Version
MS
VA
= brass
= stainless steel
Plug **
M3
GS4
M12
C7
280
370
500
Variable (please specify)
Number of level contacts
1-4
K8
W9
NC/NO
change-over contact (max. 3)
1st temperature signal
NC contact NO contact
TM50NC
TM60NC
TM70NC
TM80NC
TM50NO
TM55NO
TM60NO
TM70NO
TM80NO
= 50 °C
= 55 °C
= 60 °C
= 70 °C
= 80 °C
TM50NC
TM60NC
TM70NC
TM80NC
TM50NO
TM55NO
TM60NO
TM70NO
TM80NO
= 50 °C
= 55 °C
= 60 °C
= 70 °C
= 80 °C
2nd Temperature contact
NO contact
NC contact
= oval flange (for G3/4)
= adapter G3/4 to G1
OV
G1
not with VA version
see "Connector"
only available with G3/4 connector
Cannot be combined with temperature contact
*
**
***
****
NT M
Contact type
Options
B
A
****
-
- - -
-
-
-
-
XX
XX
XX
XX
XX
XX
Connection
G3/4
G1
FL
OV
Length
-
XX
Temperature contact
Pt100 = temperature sensor
(double temperature contact only)
***
***
*
*
*
Ordering example
You require: Level switch with G3/4 connection, brass version, length L= 500 mm,
2 level switches, 1st contact 100 mm NC, 2nd contact 450 mm NO
Order NT M-MS-G3/4-M3/500-2K-100NC-450NO
NT M Accessories
Item no. Description
9144050010 Connecting cable M12x1, 4-pin, 1.5 m, angular coupling and straight plug
9144050046 Connecting cable M12x1, 4-pin, 3.0 m, angular coupling and straight plug
9144050047 Connecting cable M12x1, 4-pin, 5.0 m, angular coupling and strands
3Bühler Technologies GmbHWe reserve the right to amend specification.DE100211 ◦ 11/2023
Nivotemp NT M, NT MD
NT M connector
Plug connection M3 valve connector GS4 M12 plug A coded C7
G3/4 X X X X
G1 X -* X -*
Flange X - X -
OV X -* X -*
* G3/4 connection with respective adapter
Dimensions
Connection schematic
3
12
PE
1
2 3
4
1
3
5
4
67
8 (PE)
2
Number of pins 3-pin + PE 4-pin 4-pin 7-pin + PE
DIN EN 175301-803 61076-2-101 175301-801
Max. voltage 230 V AC/DC* 30 V DC 30 V DC 230 V AC/DC*
IP rating IP65 IP65 IP67** IP65***
Cable fitting PG 11 PG 7 PG 11
Max. Number of contacts
Level/temp. contacts 1 x K8, 1 x TK 2 x K8, 1 x TK 1 x K8, 1 x TK 3 x K8, 1 x TK
Level contacts only
2 x K8
1 x W9
3 x K8
1 x W9
2 x K8
1 x W9
4 x K8
3 x W9
*Max. 48 V AC/V DC for change-over contact. **IP67 with cable box attached. ***IP44 with gland/without gasket.
Standard pin assignment NT M
M3 valve connector GS4 M12 plug A coded C7
K8
Level contact(s)
W9
Level contact(s)
K8
Level contact(s) and
temperature contact
K8 / Pt100
Level- and temperature sensor
K8
Level- and temperature
contact(s)
W9
Level contact(s) and
temperature contact
W9 / Pt100
Level- and temperature sensor
The pin assignments shown always show the max. population possible for the respective plug connection.
4 Bühler Technologies GmbH We reserve the right to amend specification. DE100211 ◦ 11/2023
Nivotemp NT M, NT MD
Technical Data NT M with analogue output for temperature
Version MS Dimensions
Material
L1 = min. 40
L = 280 / 370 / 500 / max. 1000
L2 = min. 80
min. 50
50
3.5
SW36
Ø23.5
last contact
first contact
45
Ø32.3
57
A
Seal
Ø32.3
M12x1
Seal
29
16
G3/4
SK161
B
SW36
G3/4
29
16
M12x1
51
Float: NBR
Immersion tube: Brass
G3/4 connection: Brass
Level switching output K8
Max. number: 2
Function: NO/NC*
Max. voltage: 30 V DC
Max. switching current: 0.5 A
Max. contact load: 10 VA
Min. contact spacing: 40 mm
*NO = falling open / NC = falling close
Optional temperature
Temperature KT
Detector: PT100 Class B, DIN EN 60 751
Measuring range*: 0 °C to 100 °C
Operating voltage (UB): 10-30 V DC
Outlet: 4-20 mA
Max. burden Ω: = (UB-7.5 V)/0.02 A
*Other measuring ranges available upon request
Adapter
OV: Adapter to oval flange incl. seal and locking nut
G1: Adapter G3/4 to G1
Connector NT M with analogue output for temperature
Plug connection M12 plug A coded 2 x M12 plug A coded
Number of pins 4-pin 2 x 4-pin
DIN EN 61076-2-101 175201-804
Connection schematic
1 x level contact
and analog output
2 x level contact
and analog output
5Bühler Technologies GmbHWe reserve the right to amend specification.DE100211 ◦ 11/2023
Nivotemp NT M, NT MD
Ordering instructions NT M with analogue output for temperature
Model key
Model designation
Version
MS
= brass
Plug
M12
2M12
280
370
500
Variable (please specify)
Number of level contacts
1 or 2
K8 NC/NO
= oval flange (for G3/4)
= adapter G3/4 to G1
OV
G1
NT M
Contact type
Options
-
- - -
-
-
MS
G3/4
XX
XX
XX
KT
Connection
G3/4
Length
-
XX
Temperature (4-20 mA)
Analogue output
-
XX
Ordering example
You require: Level switch with G3/4 connector, brass version, length 500 mm,
2 x level contact, 100 mm NC, 450 mm NO
Temperature output 0-100 °C = 4-20mA and 2 x M12 connector
Order NT M-MS-G3/4-2M12/500-2K-KT-100NC-450NO
6 Bühler Technologies GmbH We reserve the right to amend specification. DE100211 ◦ 11/2023
Nivotemp NT M, NT MD
Technical Data NT MD
Version MS Dimensions
Operating pressure: max. 1 bar
L1 = 40
L
L2 = min. 80
min. 50
14
91
LEDs
3.5
45
Ø23.5
SW 36
NBR
seal
G3/4
16
last contact
1st contact
M12x1
Housing swivels 270°
80
55
0.5
24
20.5
40
53
55
Ø6.5
Oval flange
Operating temperature: -20 °C to +80 °C
Float: SK 161
Min. fluid density: 0.80 kg/dm³
Lengths: 280, 370, 500 mm (standard)
variable to max. 1000 mm
Weight at L=280 mm: approx. 500 g
Material
Float: NBR
Immersion tube: brass
G3/4 connection: brass
Level switching output K8
Number max.: 2 (not adjustable)
Function: NO/NC*
Max. voltage: 30 V DC
Max. switching current: 0.5 A
Max. contact load: 10 VA
Min. contact spacing: 40 mm
*NO = falling open / NC = falling close
Temperature display electronics
Display: 4 character 7 segment LED
Operation: via 3 keys
Memory: min./max. data memory
Starting current input: approx. 100 mA for 100 ms
Current input during operation: approx. 50 mA (without current- and switching
outputs)
Supply voltage (U
B
): 10–30 V DC (nominal voltage 24 V DC)
Ambient temperature: -20 °C to +70 °C
Temperature display units: °C/°F
Display range: -20 °C to +120 °C
Alarm setting range: 0 °C to 100 °C
Display accuracy: ± 1 % from end value
Measuring principle: Pt 100 Class B, DIN EN 60751,
resolution 0.5 °C
Adapter
OV: adapter to oval flange incl. seal and locking nut
G1: adapter G3/4 to G1
7Bühler Technologies GmbHWe reserve the right to amend specification.DE100211 ◦ 11/2023
Nivotemp NT M, NT MD
Temperature outputs NT MD
Choose from the following temperature outputs:
2T 1T-KT 4T
Plug (base) 2 x M12 – 4-pin 2 x M12 – 4-pin 1 x M12 – 4-pin
1 x M12 – 8-pin
Switching outputs
2 x freely programmable* 1 x freely programmable* 4 x freely programmable*
Alarm memory 1 switching output
assignable to alarm logbook
1 switching output
assignable to alarm logbook
1 switching output as-
signable to alarm logbook
max. switching current** 0.5 A per output
continuous short-circuit
protected
0.5 A per output
continuous short-circuit
protected
0.5 A per output
continuous short-circuit
protected
Contact load max. 1 A total max. 1 A total max. 1 A total
Analog output 1 x 4 – 20mA,
2-10VDC, 0-10VDC,
0-5VDC
Max. burden Ω as current output = (U
B
-8 V)/0.02 A
Min. input load as voltage output 10 kΩ
*Switching output 1+2 also programmable as frequency output 1-100 Hz.
**Output 1 max. 0.2 A.
NT MD ordering instructions
Model key
Model designation
Version
MS
Brass
Plug
2 x M12
280
370
500
Variable (please specify)
Number of level contacts
1 or 2 K8 NC/NO
1st level contact
switching function 2nd contact
LED temperature display
= Oval flange
= Adapter G3/4 to G1
OV
G1
NT MD
Installation dimensions L1 = ...mm
Options
-
- - -
-
-
XX
XX
XX
XX
XX
XX
Connection
G3/4
Length
-
XX
XX
-
XX
-
XX
-
XX
-
2T
2 x temperature output
4T
4 x temperature output
1T-KT
1x temperature output
1x analogue output
NO/NC
Installation dimensions L2 = ...mm
2nd level contact
Switching function 1st contact
NO/NC
Ordering example
You require: Level switch with G3/4 connection, brass, length L= 500 mm, 2 level contacts,
1st contact 100 mm NC, 2nd contact 450 mm NO,
Temperature analysis with display and 2 programmable outputs.
Order NT MD-MS-G3/4-2M12 / 500-2K-100NC-450NO-2T
8 Bühler Technologies GmbH We reserve the right to amend specification. DE100211 ◦ 11/2023
Nivotemp NT M, NT MD
Standard pin assignment NT MD
Standard pin assignment 2T 4T 1T-KT
Level contact(s)
2x temperature output
Level contact(s)
4x temperature output
Level contact(s)
1x temperature output
1x analogue output
Plug A
level
Plug B
temperature
9Bühler Technologies GmbHWe reserve the right to amend specification.DE100211 ◦ 11/2023