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Brief description


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Brief description

Thermostats control and monitor thermal processes. Instruments of the ATH type series are available as temperature controllers TR, temperature monitors TW, safety temperature monitors STW (STB) and safety temperature limiters STB. When faults occur, the STB places the system being monitored in a safe operating state.

Surface-mounting thermostats work on the principle of liquid expansion, with a microswitch acting as the electrical switching device.

Switching function

Temperature controllers TR and temperature monitors TW When the temperature present at the temperature probe exceeds the specified setpoint, the microswitch mechanism operates and the circuit is opened or closed. If the value falls below the specified setpoint (by the switching differential) the microswitch returns to its initial condition.

Restart lockout on the safety temperature limiter STB
Should the temperature present at the temperature probe exceed the specified limit, the circuit opens and the microswitch is mechanically locked.

Self-monitoring on the safety temperature limiter STB
and the safety temperature monitor STW (STB)
With the STB and the STW (STB), if the measuring system is destroyed, that is, should the expansion fluid escape, the pressure in the diaphragm will fall and the circuit will be permanently open. It is then no longer possible to deactivate the lockout.

The circuit will also open if the temperature at the probe cools to below about -20°C. If the temperature rises above about -20°C, STB lockout must first be manually deactivated by pressing the reset button. Reset is automatic for the STW (STB).


ATH Type Series

  • enclosure protection IP 54
  • tested to DIN EN 14597 (replacing DIN 3440)

Technical data:

Control ranges and temperature probes

Type Controllimit
ranges
in °C
Max. permissible
probe temperature in °C
Maximum
capillary length
in mm
Probe length dim. "L" in mm Probe ø "d" in mm, ø "6" = standard
ATH.-1 ATH.-2 -20 ... +050
-10 ... +040
0 ... +50
0 ... +70
0 ... +100
+20 ... +90
+30 ... +110
+20 ... +120
+60 ... +130
+20 ... +150
+50 ... +200
+50 ... +250
+50 ... +300
+50 ... +350
60
50
60
80
125
115
135
140
150
176
230
290
345
405
5000 141
185
185
138
107
138
125
106
135
88
101
73
63
53
92
115
115
91
75
91
84
71
90
65
72
54
49
---
ATH.-20
ATH.-70
+30 ... +110
+60 ... +130
+20 ... +150
+50 ... +250
+50 ... +300
135
150
175
290
345
5000 108
116
77
64
55
75
79
60
49
---
gas-filled
ATH.-1
ATH.-2
+20 ... +400
+20 ... +500
+20 ... +500
460
550
550
1000
2000
4000
278
148
202
158
092
119
ATH.-20
ATH.-70
+20 ... +400
+20 ... +500
+20 ... +500
460
550
550
1000
2000
4000
176
127
202
106
81
119

Capillaries and temperature probes

Type End of scale Capillary Temperature sensor
ATH.-. . up to 200°C Copper (Cu)
ø 1,5mm
material ref. Cu-DHP
Copper (Cu)
material ref.Cu-DHP
brazed
up to 350°C Copper (Cu)
ø 1,5mm
material ref. Cu-DHP
Stainless steel (CrNi)
material ref. 1.4571
brazed
-
up to 500°C Stainless steel (CrNi)
ø 1,5mm
material ref. 1.4571
Stainless steel (CrNi)
material ref. 1.4571
welded
-
up to 350°C Stainless steel (CrNi)
ø 1,5mm
material ref. 1.4571
Stainless steel (CrNi)
material ref. 1.4571
welded
Mod merpris
Capillary length Seriemæssig 1000 mm, max. 5000 mm
min. bending radius of capillary/td> 5 mm

ATH Type Series

  • enclosure protection IP 54
  • tested to DIN EN 14597 (replacing DIN 3440)

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