Danfoss ST-1 safety thermostat

Part Number
087N1050 · HS 9032.10

Danfoss ST-1 combined safety thermostat for district heating/cooling circulation water, integrating a safety temperature monitor (STW, auto-reset) plus temperature regulator (TR) in one housing with two temperature sensors. Safety monitor STW setting: 100 to 120 °C (adjustable), auto-reset. Regulator TR setting: 30 to 120 °C. Sensor pocket brass Ms 58 / copper, R ½ connection, 9 mm dia x 100 mm sensor, PN 10 bar, IP40, Pg 20 cable entry. OEM P/N 087N1050. EAN 5702421715000. Verbatim technical data from store.danfoss.com (code 087N1050).

Technical Specifications

Type

ST-1

Code number

087N1050

Product group

Safety thermostats

Function

safety temperature monitor (STW, auto-reset) plus temperature regulator (TR)

Safety monitor STW setting

100 to 120 °C (adjustable), auto-reset

Regulator TR setting

30 to 120 °C

Differential STW

12 (±3) K; Differential TR: 4 (±1) K

Number of temperature sensors

Cut-out accuracy

0 to 6 K

Permissible media

District heating/cooling circulation water

Nominal pressure

10 bar

Sensor connection

R ½

Sensor pocket material

Brass Ms 58 / copper

Sensor diameter

9 mm

Sensor length

100 mm

Max sensor temperature

130 °C

Contacts

Ag 1000/1000

Contact rating (ohmic)

10 A

Contact rating (inductive)

2.5 A

Contact rating (three-phase)

7 A

Cable entry

Pg 20

Grade of enclosure

IP40

Mounting orientation

No restriction

Ambient temperature (max)

80 °C

Net weight

0.436 kg

Gross weight

0.46 kg

EU RoHS

Yes (with exemption 6(c))

China RoHS

Out of scope

REACH candidate-list

Lead (CAS 7439-92-1)

EAN

5702421715000

Danfoss ST-1. ST-1 (087N1050) is an auto-reset safety monitor; ST-2 (087N1051) is a manual-reset safety limiter — select per the plant safety concept (EN 14597). Confirm sensor pocket length and R ½ connection.

Material	Sensor pocket brass Ms 58 / copper; contacts Ag 1000/1000
Pressure rating	10 bar
Temperature range	STW 100-120 °C auto-reset + TR 30-120 °C
IP rating	IP40
MOQ	1

Danfoss ST-1 safety thermostat

Technical Specifications

Properties

Compatibility

Approvals

Attached Documents