Sauermann Si-TH4 Wireless Psychrometer

active

Supported models: Si-TH4 (sales reference 28145)

Air Humidity
Bluetooth
Air Temperature

Connects via:

Direct Connect

No Beaconing

Wireless psychrometer measuring temperature and humidity with dry/wet bulb calculation, connecting to the Si-RM350/Si-RM450 manifolds and Sauermann Pilot app.

The Sauermann Si-TH4 is a wireless psychrometric probe providing indoor and outdoor temperature and humidity measurements for air conditioning, refrigeration, and heat pump work. It calculates dry bulb and wet bulb temperatures using a flexible probe with a sliding magnet for convenient positioning, and uses CMOS temperature and humidity sensors. It reads -20 to 60 C (-4 to 140 F) temperature and 0 to 100% RH humidity, and connects over Bluetooth Low Energy at up to 100 m (328 ft) range to the Si-RM350 and Si-RM450 manifolds and the Sauermann Pilot app, feeding psychrometric inputs into measureQuick via the manifold and app ecosystem.

Specifications

Specification	Value
Temperature sensor type	CMOS
Temperature range	-20 to 60 C (-4 to 140 F)
Temperature accuracy	-20 to 0 C: +/- 0.3 C (0.6 F); 0 to 60 C: +/- 0.5 C (0.9 F)
Temperature resolution	0.1 C / 0.1 F
Humidity sensor type	CMOS
Humidity range	0 to 100% RH
Humidity accuracy	+/- 2% RH (15 to 25 C, 10 to 90% RH)
Calculated parameters	Dry bulb, wet bulb temperatures
Power supply	3x LR03 AAA 1.5 V alkaline
Battery life	50 h @ 20 C / 68 F
Wireless frequency	2402 to 2480 MHz, 8 dBm
Wireless range	Up to 100 m (328 ft)
App compatibility	Android 11.0, iOS 15, BLE 5.0 (BLE 4.0 with reduced range)
Dimensions	410.2 x 37.7 x 34.85 mm (L x W x H)