URx21xS – Gas detectors with 4÷20 mA output and 4 relay outputs – ATEX Ex nA

ATEX Ex nA certified gas detector with operating status LED, to warn of gas alarms through 4÷20 mA analogue output or at threshold limit setpoints (pre-alarm, level 1 and 2 alarms, fail) that can be freely selected using 4 relay outputs (with optional card UZR20.4 ).

Power supply: 10÷28 Vdc
Signal outputs: 4÷20 mA
Command outputs: 4 SPDT relays (with card UZR20.4)
Sensor: S (Standard) or P (Professional)
Protection mode: ATEX II 3G Ex nA nC d IIC T6 Gb
Ambient temp.: -20 °C/+50 °C
Extended Temp. Range (On request): -40 °C/+70 °C

Sensigas URx21xS documentation
Sensigas URD21IS CARBON DIOXIDE documentation
Sensigas URS21.S OXYGEN documentation

Professional sensor (P)

URx21PS

URB21PS GASOLINE VAPOUR (B)
URC21PS PROPANE (C)
URE21PS ETHYL ALCOHOL (E)
URG21PS METHANE (G)
URI21PS HYDROGEN (I)
URL21PS ACETYLENE (L)
URM21PS AMMONIA (M)
URO21PS CARBON MONOXIDE (O)
URP21PS LPG (P)
URT21PS OCTANE (T)

Standard sensor (S)

URx21SS

URB21SS GASOLINE VAPOUR (B)
URC21SS PROPANE (C)
URE21SS ETHYL ALCOHOL (E)
URG21SS METHANE (G)
URI21SS HYDROGEN (I)
URL21SS ACETYLENE (L)
URM21SS AMMONIA (M)
URO21SS CARBON MONOXIDE (O)
URP21SS LPG (P)
URT21SS OCTANE (T)
URS21SS OXYGEN (S)
URD21IS CARBON DIOXIDE (D)

  • 128x64 dot (32x18mm) backlit graphic display
  • Hall sensors for menu navigation with magnetics actuator UCM (with enclosure closed)

Professional sensor (P)

DN-URx21PS

DN-URB21PS GASOLINE VAPOUR (B)
DN-URC21PS PROPANE (C)
DN-URE21PS ETHYL ALCOHOL (E)
DN-URG21PS METHANE (G)
DN-URI21PS HYDROGEN (I)
DN-URL21PS ACETYLENE (L)
DN-URM21PS AMMONIA (M)
DN-URO21PS CARBON MONOXIDE (O)
DN-URP21PS LPG (P)
DN-URT21PS OCTANE (T)

Standard sensor (S)

DN-URx21SS

DN-URB21SS GASOLINE VAPOUR (B)
DN-URC21SS PROPANE (C)
DN-URE21SS ETHYL ALCOHOL (E)
DN-URG21SS METHANE (G)
DN-URI21SS HYDROGEN (I)
DN-URL21SS ACETYLENE (L)
DN-URM21SS AMMONIA (M)
DN-URO21SS CARBON MONOXIDE (O)
DN-URP21SS LPG (P)
DN-URT21SS OCTANE (T)
DN-URS21SS OXYGEN (S)
DN-URD21IS CARBON DIOXIDE (D)

  • 128x64 dot (32x18mm) backlit graphic display
  • Hall sensors for menu navigation with magnetics actuator UCM (with enclosure closed)
  • Control outputs: N. 4 SPDT relays integrated in the display board

Professional sensor (P)

DR-URx21PS

DR-URB21PS GASOLINE VAPOUR (B)
DR-URC21PS PROPANE (C)
DR-URE21PS ETHYL ALCOHOL (E)
DR-URG21PS METHANE (G)
DR-URI21PS HYDROGEN (I)
DR-URL21PS ACETYLENE (L)
DR-URM21PS AMMONIA (M)
DR-URO21PS CARBON MONOXIDE (O)
DR-URP21PS LPG (P)
DR-URT21PS OCTANE (T)

Standard sensor (S)

DR-URx21SS

DR-URB21SS GASOLINE VAPOUR (B)
DR-URC21SS PROPANE (C)
DR-URE21SS ETHYL ALCOHOL (E)
DR-URG21SS METHANE (G)
DR-URI21SS HYDROGEN (I)
DR-URL21SS ACETYLENE (L)
DR-URM21SS AMMONIA (M)
DR-URO21SS CARBON MONOXIDE (O)
DR-URP21SS LPG (P)
DR-URT21SS OCTANE (T)
DR-URS21SS OXYGEN (S)
DR-URD21IS CARBON DIOXIDE (D)

UZR20.4

Relay card for URx20xx detectors

4 SPDT relays 50 mA at 24Vac/dc 100 mA at 12Vac/dc

UZS20.x

Module with n. 1 opto-isolated resistive output (two wires)

UZS20.E

  • 22KOhm = normal operation
  • 10Kohm = pre-alarm
  • 2,2KOhm = alarm threshold 1
  • open = failure

UZS20.A

  • 27KOhm = normal operation
  • 10KOhm = alarm threshold 1
  • open = failure

UZS20.S

  • 27KOhm = normal operation
  • 0 Ohm = alarm threshold 1
  • open = failure