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Sauermann Si-TH4 Wireless Thermo-hygrometer (Psychrometer)

Sauermann
SKU: SAUESITH4
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Key Features
  • Flexible probe with sliding magnet for easy positioning
  • Fast and accurate calculations of Dry Bulb and Wet Bulb temperatures
  • Compatible with A1 / A2L / A2 / A3 refrigerants

Related Categories

Heat Pump Testing / Commissioning Hygrometers & Humidity Meters
Description

Sauermann Si-TH4 Wireless Thermo-hygrometer (Psychrometer)

The Sauermann Si-TH4 Wireless Thermo-hygrometer (Psychrometer) is a psychrometric probe that is designed to provide accurate indoor and outdoor measurements of temperature (-20°C to 60°C) and humidity (0% to 100% RH). It is made to use in air conditioning, refrigeration, and heat pump installations, allowing fast and easy calculation of dry bulb and wet bulb temperatures.

The Si-TH4 features a flexible probe with a sliding magnet, which makes it convenient to place it in ducts, units and other measurement points. It automatically connects to the Si-RM350 and Si-RM450 manifolds, as well as to the Sauermann Pilot App at a wireless distance of 100 m (328 ft), providing technicians with immediate access to real-time data for diagnostics and system optimisation.

The Si-TH4 is compatible with A1, A2L, A2, and A3 refrigerants and with certain B1 refrigerants. However, it must not be used with ammoniac refrigerant NH₃ / R717. Powered by three LR03 AAA 1.5 V alkaline batteries, the Si-TH4 offers an impressive 50 hours of continuous battery life for continuous use in the field.

Part number: 28145

Comparing Sauermann Si-RT2, Si-RT5, Si-RT7 and Si-TH4

Specifications Si-RT2 Si-RT5 Si-RT7 Si-TH4
Sensor type NTC NTC NTC CMOS (Temp + Humidity)
Available units °C, °F °C, °F °C, °F °C, °F
Resolution 0.1 °C / 0.1 °F 0.1 °C / 0.1 °F 0.1 °C / 0.1 °F 0.1 °C / 0.1 °F
0.1% RH
Temperature range -50 to 120 °C (-58 to 248 °F) -20 to 85 °C (-4 to 185 °F) -20 to 85 °C (-4 to 185 °F) -20 to 60 °C (-4 to 140 °F)
Temperature accuracy ±1 °C (from -20 to 85 °C) -20 to 70 °C: ±0.3 °C
70 to 85 °C: ±0.5 °C		 ±1 °C -20 to 0 °C: ±0.3 °C
0 to 60 °C: ±0.5 °C
Humidity range - - - 0–100 %RH
Humidity accuracy - - - ±2 %RH (10–90 %RH)
±5 %RH (0–10 %RH / 90–100 %RH)
Max Operating Temp Jaws: 150 °C, Handle: 90 °C - Jaws: 85 °C, Handle: 50 °C -
Power Supply Via manifold (wired) Via manifold (wired) 3 × AAA batteries 3 × AAA batteries
Battery Life - - 150 h @ 20 °C 50 h @ 20 °C
Wireless Frequency - - 2402–2480 MHz, 8 dBm 2402–2480 MHz, 8 dBm
Wireless Range - - Up to 100 m (manifold or smartphone BLE 5.0) Up to 100 m (manifold or smartphone BLE 5.0)
Storage Temp -20 to 50 °C -20 to 50 °C -20 to 50 °C -20 to 50 °C
Compatibility Si-RM350 & Si-RM450 manifolds Si-RM350 & Si-RM450 manifolds Si-RM350, Si-RM450, Sauermann Pilot app Si-RM350, Si-RM450, Sauermann Pilot app
Mounting Method Parrot-shaped clamp Hook-and-loop strap Parrot-shaped clamp Flexible probe with sliding magnet
Pipe Diameter 6–42 mm (0.2’’–1.7’’) Up to 100 mm (3.9’’) 6–42 mm (0.2’’–1.7’’) -
Cable 2 m PVC, Ø3.2 mm, max 105 °C 2 m PVC, Ø3.2 mm, max 105 °C Wireless (no cable) Wireless (no cable)

 

Key Features

  • A1 / A2L / A2 / A3 refrigerants compatible
  • For use with Si-RM350/Si-RM450 Digital Manifolds
  • Fast and accurate Dry Bulb and Wet Bulb temperatures
  • Outdoor, indoor and in-ducts measurements
  • Flexible probe with sliding magnet for easy positioning
  • Quick & Strong wireless auto connection (100 m/328 ft range)
  • Real-time readings through direct connection to Sauermann Pilot mobile app
Specification
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Specification
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Units

  • °F, °C, % RH

Instrument Dimensions

  • Length: 16 3/32 inches , 410.2 mm
  • Width: 1 1/2 inches , 37.7 mm
  • Height: 1 13/32 inches , 34.85 mm

Measuring ranges

  • Temperature: -20.00 °C ... 60.00 °C
  • Humidity: 0.00 % RH ... 100.00 % RH

Technical details

  • Parameters: Relative humidity Temperature
  • Battery life: 50 hours
  • Standards: 2011/65/EU RoHS II
  • 2012/19/EU WEEE
  • 2014/53/EU RED
  • Wireless connection: Yes
  • Power supply: 3x LR03 AAA 1.5 V alkaline batteries
Reviews
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