Home / Controls, safety & Regulation / Types VR and VU: SPDT Bimetal rod thermostats with dead zone
TECHNICAL FEATURES
Applications: These thermostat have a rod section that is not sensible to temperature. This allows to keep the thermostat head away from high temperatures. Therefore, they are more used in air duct temperature control.
Temperature ranges: 0-100°C (32-212°F), 0-200 °C (32-392°F), 0-300°C (32-572°F), 0-400°C (32-752°F)
Housing dimensions: 65 x48 x 48 mm (knob not included)
Material: PA66 housing, and Aisi 304 stainless steel rod
Temperature sensing element: Invar/stainless steel bimetal rod, temperature sensing
Electrical connections: screw terminals
Mounting:
– For liquid temperature sensing: inside pocket with internal diameter > 10 mm , or directly on 3/8”BSPP thread under the head, or with 3/8 x1/2” fitting (see accessories)
– For air temperature sensing measurement: with stainless steel bracket, with or without rod cooler
Rating: 16(4)A 250/400VAC, 300.000 cycles. Reduced differential model is not recommended for 400V applications.
Contacts: SPDT, snap action
Max ambient temperature on the head: 85°C (185°F)
Options:
-Cnomo electrical connector
–Other temperature ranges.
-Other rod lengths
-IP65 aluminum housing: See catalogue N°2
Accessories: BSPT 1/2” stainless steel pocket, fittings, bracket, see full description and references at end of this catalogue
Approvals: comply with EN 60730-1 and EN 60730-2 standards
Main references
Temperature range
°C (°F) |
Rod length (mm) | Reference with standard differential* | Differential value
°C (°F) |
Reference with reduced differential* | Differential value
°C (°F) |
Max. temperature on rod
°C (°F) |
0-100°C
(32-212°F) |
300 | VRA00010000300 | 6±3°C (10.8±5.4°F) | VUA00010000300 | 3±1.5°C (5.4±2.7°F) | 130°C (266°F) |
0-100°C
(32-212°F) |
450 | VRA00010000450 | 6±3°C (10.8±5.4°F) | VUA00010000450 | 3±1.5°C (5.4±2.7°F) | 130°C (266°F) |
0-200°C
(32-392°F) |
300 | VRA00020000300 | 12±6°C (21.6±10.8°F) | VUA00020000300 | 6±3°C (10.8±5.4°F) | 230°C (446°F) |
0-300°C
(32-572°F) |
300 | VRA00030000300 | 18±9°C (32.4±16.2°F) | VUA00030000300 | 9±4.5°C (16.2±8.1°F) | 350°C (662°F) |
0-400°C
(32-752°F) |
450 | VRA00040000450 | 24±12°C (43.2±21.6°F) | VUA00040000450 | 12±6°C (21.6±10.8°F) | 450°C (842°F) |
* These products can also be supplied with Cnomo connector electrical output: Replace the last number in the reference “0” by “1”