diff --git a/firmware/application/apps/ui_debug.cpp b/firmware/application/apps/ui_debug.cpp
index 2c82f04b..35f2b71a 100644
--- a/firmware/application/apps/ui_debug.cpp
+++ b/firmware/application/apps/ui_debug.cpp
@@ -124,8 +124,8 @@ void TemperatureWidget::paint(Painter& painter) {
 }
 
 TemperatureWidget::temperature_t TemperatureWidget::temperature(const sample_t sensor_value) const {
-    /*It seems to be a temperature difference of 25C*/
-    return -40 + (sensor_value * 4.31) + 25;  // max2837 datasheet temp 25ºC has sensor value: 15
+    // Scaling is different for MAX2837 vs MAX2839 so it's now done in the respective chip-specific module
+    return sensor_value;
 }
 
 std::string TemperatureWidget::temperature_str(const temperature_t temperature) const {
diff --git a/firmware/application/hw/max2837.cpp b/firmware/application/hw/max2837.cpp
index 71187980..f6fe277e 100644
--- a/firmware/application/hw/max2837.cpp
+++ b/firmware/application/hw/max2837.cpp
@@ -321,7 +321,7 @@ void MAX2837::set_rx_buff_vcm(const size_t v) {
     flush();
 }
 
-reg_t MAX2837::temp_sense() {
+int8_t MAX2837::temp_sense() {
     if (!_map.r.rx_top.ts_en) {
         _map.r.rx_top.ts_en = 1;
         flush_one(Register::RX_TOP);
@@ -334,12 +334,15 @@ reg_t MAX2837::temp_sense() {
 
     halPolledDelay(ticks_for_temperature_sense_adc_conversion);
 
-    const auto value = read(Register::TEMP_SENSE);
+    /*
+     * Conversion to degrees C determined by testing - does not match data sheet.
+     */
+    reg_t value = read(Register::TEMP_SENSE) & 0x1F;
 
     _map.r.rx_top.ts_adc_trigger = 0;
     flush_one(Register::RX_TOP);
 
-    return value;
+    return value * 4.31 - 6;  // reg value is 0 to 31; possible return range is -6 C to 127 C
 }
 
 }  // namespace max2837
diff --git a/firmware/application/hw/max2837.hpp b/firmware/application/hw/max2837.hpp
index 35ad59f8..101235a9 100644
--- a/firmware/application/hw/max2837.hpp
+++ b/firmware/application/hw/max2837.hpp
@@ -833,7 +833,7 @@ class MAX2837 : public MAX283x {
     void set_vco_bias(const size_t v);
     void set_rx_buff_vcm(const size_t v) override;
 
-    reg_t temp_sense() override;
+    int8_t temp_sense() override;
 
     reg_t read(const address_t reg_num) override;
 
diff --git a/firmware/application/hw/max2839.cpp b/firmware/application/hw/max2839.cpp
index c207adf1..bc37073e 100644
--- a/firmware/application/hw/max2839.cpp
+++ b/firmware/application/hw/max2839.cpp
@@ -351,7 +351,7 @@ void MAX2839::set_rx_buff_vcm(const size_t v) {
     flush();
 }
 
-reg_t MAX2839::temp_sense() {
+int8_t MAX2839::temp_sense() {
     if (!_map.r.rx_top_2.ts_en) {
         _map.r.rx_top_2.ts_en = 1;
         flush_one(Register::RX_TOP_2);
@@ -365,15 +365,14 @@ reg_t MAX2839::temp_sense() {
     halPolledDelay(ticks_for_temperature_sense_adc_conversion);
 
     /*
-     * Things look very similar to MAX2837, so this probably works, but the
-     * MAX2839 data sheet does not describe the TEMP_SENSE register contents.
+     * Conversion to degrees C determined by testing - does not match data sheet.
      */
-    const auto value = read(Register::TEMP_SENSE);
+    reg_t value = read(Register::TEMP_SENSE) & 0x1F;
 
     _map.r.rx_top_2.ts_adc_trigger = 0;
     flush_one(Register::RX_TOP_2);
 
-    return value;
+    return value * 4.31 - 75;  // reg value is 0 to 31; possible return range is -75 C to 58 C
 }
 
 }  // namespace max2839
\ No newline at end of file
diff --git a/firmware/application/hw/max2839.hpp b/firmware/application/hw/max2839.hpp
index fd919068..2228d8b7 100644
--- a/firmware/application/hw/max2839.hpp
+++ b/firmware/application/hw/max2839.hpp
@@ -692,7 +692,7 @@ class MAX2839 : public MAX283x {
     void set_rx_lo_iq_calibration(const size_t v) override;
     void set_rx_buff_vcm(const size_t v) override;
 
-    reg_t temp_sense() override;
+    int8_t temp_sense() override;
 
     reg_t read(const address_t reg_num) override;
 
diff --git a/firmware/application/hw/max283x.hpp b/firmware/application/hw/max283x.hpp
index 5e75e531..7296e321 100644
--- a/firmware/application/hw/max283x.hpp
+++ b/firmware/application/hw/max283x.hpp
@@ -131,7 +131,7 @@ class MAX283x {
     virtual void set_rx_lo_iq_calibration(const size_t v);
     virtual void set_rx_buff_vcm(const size_t v);
 
-    virtual reg_t temp_sense();
+    virtual int8_t temp_sense();
 
     virtual reg_t read(const address_t reg_num);
 };
diff --git a/firmware/application/radio.cpp b/firmware/application/radio.cpp
index 45886c6c..f8393146 100644
--- a/firmware/application/radio.cpp
+++ b/firmware/application/radio.cpp
@@ -295,8 +295,8 @@ uint32_t register_read(const size_t register_number) {
     return radio::second_if->read(register_number);
 }
 
-uint8_t temp_sense() {
-    return radio::second_if->temp_sense() & 0x1f;
+int8_t temp_sense() {
+    return radio::second_if->temp_sense();
 }
 
 } /* namespace second_if */
diff --git a/firmware/application/radio.hpp b/firmware/application/radio.hpp
index fca124cd..090499bd 100644
--- a/firmware/application/radio.hpp
+++ b/firmware/application/radio.hpp
@@ -73,7 +73,7 @@ namespace second_if {
 uint32_t register_read(const size_t register_number);
 
 // TODO: This belongs somewhere else.
-uint8_t temp_sense();
+int8_t temp_sense();
 
 } /* namespace second_if */
 
diff --git a/firmware/application/temperature_logger.hpp b/firmware/application/temperature_logger.hpp
index 8ccb4827..d83a88b5 100644
--- a/firmware/application/temperature_logger.hpp
+++ b/firmware/application/temperature_logger.hpp
@@ -29,7 +29,7 @@
 
 class TemperatureLogger {
    public:
-    using sample_t = uint8_t;
+    using sample_t = int8_t;
 
     void second_tick();