diff --git a/site_ansto/instrument/sans/config/environment/viscosity/sct_rheometer.tcl b/site_ansto/instrument/sans/config/environment/viscosity/sct_rheometer.tcl
new file mode 100644
index 00000000..117a95ca
--- /dev/null
+++ b/site_ansto/instrument/sans/config/environment/viscosity/sct_rheometer.tcl
@@ -0,0 +1,81 @@
+## RHEOMETER CONTROL
+
+proc rhCallBack {rootPath} {
+  # if rhSpeed >= trigger then start histmem and pop trigger and time
+  if {[hval $rootPath/runexp] != 1} {
+    return idle
+  }
+  set trigList [hval $rootPath/triggerList]
+  if {$trigList == "EMPTY"} {
+    hset $rootPath/acqTime     "EMPTY"
+    hset $rootPath/runexp 0
+    return idle
+  }
+  set acqTime [hval /sics/rhSpeed/acqTime]
+  if {$acqTime == "EMPTY"} {
+    broadcast "You must set acquisition time"
+    return idle
+  }
+  set rhSpeed [hval $rootPath]
+  set trigLevel [lindex $trigList 0]
+  if {$rhSpeed >= $trigLevel } {
+    set listLen [llength $trigList]
+    if {$listLen > 1} {
+    # If the rhSpeed has jumped over a number of trigger values then skip over those elements in the list
+      for {set tlIndex 1} {$tlIndex < $listLen} {incr tlIndex} {
+        set trigLevel [lindex $trigList $tlIndex]
+        if {$rhSpeed < $trigLevel } {
+          break
+        }
+      }
+    }
+    histmem pause
+    broadcast [info level 0] [hval $rootPath] trigger a [lindex $acqTime 0] second acquisition, sicstime [sicstime]
+    histmem mode time
+    histmem preset [lindex $acqTime 0]
+    histmem start
+    if {$listLen > 1} {
+      # Pop trigger
+      hset $rootPath/triggerList [lrange $trigList $tlIndex end]
+    } else {
+      hset $rootPath/triggerList "EMPTY"
+      hset $rootPath/acqTime     "EMPTY"
+      hset $rootPath/runexp 0
+    }
+    if { $acqTime != "EMPTY"  && [llength $acqTime] > 1} {
+      hset $rootPath/acqTime [lrange $acqTime 1 end]
+    }
+  }
+  return idle
+}
+
+##
+# @brief Pop trigger and acquisition time
+proc rheometer_savehmmdata {rootPath} {
+  set si [hval $rootPath/saveIndex]
+  broadcast [info level 0]: save data index = $si, sicstime [sicstime]
+  save $si
+  if {[hval $rootPath/runexp] == 0} {
+    hset $rootPath/saveIndex 0
+    newfile clear
+  } else {
+    incr si
+    hset $rootPath/saveIndex $si
+  }
+}
+publish rheometer_savehmmdata user
+
+
+proc add_rheo {IP} {
+MakeProtek rhTorque $IP 4002
+MakeProtek rhSpeed  $IP 4001 1.0 0.0 0.5 "rhCallBack /sics/rhSpeed"
+hfactory /sics/rhSpeed/saveIndex plain user int
+hset     /sics/rhSpeed/saveIndex   0
+hfactory /sics/rhSpeed/triggerList plain user text
+hset     /sics/rhSpeed/triggerList "EMPTY"
+hfactory /sics/rhSpeed/acqTime plain user text
+hset     /sics/rhSpeed/acqTime     "EMPTY"
+hfactory /sics/rhSpeed/runexp plain user float
+hset     /sics/rhSpeed/runexp 0
+scriptcallback connect hmm COUNTEND "rheometer_savehmmdata /sics/rhSpeed"
+}